CN101464656A - Timekeeping device and satellite signal reception method for a timekeeping device - Google Patents

Timekeeping device and satellite signal reception method for a timekeeping device Download PDF

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Publication number
CN101464656A
CN101464656A CNA2008101856593A CN200810185659A CN101464656A CN 101464656 A CN101464656 A CN 101464656A CN A2008101856593 A CNA2008101856593 A CN A2008101856593A CN 200810185659 A CN200810185659 A CN 200810185659A CN 101464656 A CN101464656 A CN 101464656A
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satellite
time
signal
reception
information
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CN101464656B (en
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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 timekeeping device capable of receiving satellite signals in a short time, reducing power consumption, reducing the influence of reception condition and increasing successful reception probability. A watch with GPS has a reception unit that captures the GPS satellite and receives the satellite signals, a time information generating unit that generates time information based on the satellite signal received by the reception unit, a time display unit that displays time information, and a reception control unit (50). The reception control unit (50) includes a satellite capture control unit (51) that controls the reception unit to run the GPS satellite capture process, a signal condition detection unit (52) that detects the signal condition of the captured GPS satellite, a decoding control unit (53) that controls the reception unit to apply a decoding process to the satellite signal transmitted from the captured GPS satellite, and a reception channel setting unit (54) that sets the reception unit to a single satellite mode or a multi-channel mode based on the signal condition detected by the signal condition detection unit (53).

Description

The satellite signal reception method of time set and time set
Technical field
The present invention relates to a kind of reception from locations such as for example gps satellites with the electric wave of satellite transmission and obtain current date and constantly etc. the time set and the satellite signal reception method of time set.
Background technology
In the system that self-position is carried out location is in GPS (the Global Positioning System) system, uses the gps satellite with earth-circling track, is provided with the atom clock and watch in this gps satellite.Therefore, gps satellite has the time information (the GPS moment, satellite time information) of clock like precision.
Proposed to use the time information (GPS constantly) of this gps satellite to carry out the electronic watch (patent documentation 1) of time correction.
Signal (navigation message) from gps satellite is synchronous with reseting of the C/A sign indicating number (Coarse and Acquisition Code) that begins in a GPS week constantly, transmit frame or subframe.Therefore, if can use C/A sign indicating number decoded navigation message, then only according to learning from the signal of a satellite elapsed time that begins in a week constantly from GPS, can be constantly with about 0.1 second precision revisal.
Promptly, the track of gps satellite is 20000～27000km approximately, so the travel-time of electric wave is 66.6～90ms approximately, by it is carried out revisal, can synchronously, can realize the timing of no problem in actual applications precision with the error and the UTC (agreement zebra time) of about Millisecond.
Patent documentation 1: 10-No. 10251 communiques of Japanese kokai publication hei
, the electronic watch of above-mentioned patent documentation 1 is the clock and watch that entablement clock and wall clock fixedly install like that, and the signal of gps satellite is also with the prerequisite that is received as of point of fixity.And about 12 hours of gps satellite is around one week of the earth, thus if with reference to the satellite resume and the orbit information that last time received, can judge that then gps satellite and selectivity that current point in time can receive catch, therefore can be rapidly receiving satellite signal reliably.
But carry-on clock and watch such as wrist-watch are promptly moving under the state that is worn on the user sometimes and are receiving, sometimes in indoor reception.And carry-on clock and watch are compared with the fixing clock and watch that use, and the user is higher by the probability that manual operation receives.Therefore, in wrist-watch etc., receiving position is bigger with last time different possibilities with time of reception receiving when handling, and can not effectively utilize reception resume last time.
And in carry-on clock and watch such as wrist-watch, memory span that can be built-in is also less big, is difficult to store the reception resume of each sufficient satellite and the situation of orbit information so exist, and says from this point and can not effectively utilize the reception resume.
Therefore, in the wrist-watch that can receive from the signal of gps satellite, it is in the majority never to keep the cold state of the orbit information of satellite to carry out the situation of satellite acquisition.
Therefore, in time of reception during information, need the random search gps satellite.When carrying out this search processing, if can utilize the gps satellite decoded navigation data (NAV data) that capture at first, then can shorten time of reception, reduce power consumption.
But, because from the signal of the gps satellite that captures is that feeble signal or the course line that receives the user are changed during reception in moving or be under the blocking of high-rise, make that the possibility that can not receive from the signal of catching satellite is bigger, need to search for gps satellite again at every turn, cause that overall time of reception is elongated, power consumption increases.
Summary of the invention
The objective of the invention is to, the satellite signal reception method of a kind of time set and time set is provided, receiving satellite signal and reduce power consumption at short notice can reduce the influence of reception environment simultaneously and improves the probability that successfully receives.
Time set of the present invention has: acceptance division, and its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described reception control part has: satellite is caught control part, and it controls the seizure processing that described acceptance division makes it executing location information satellite; The signal condition test section, the signal condition of the positional information satellite that its detection captures; Decoding control section, it is controlled described acceptance division and makes it to carry out from the decoding processing of the satellite-signal of the positional information satellite transmission that captures; And receiving channel setting portion, its basis is by the detected signal condition of described signal condition test section, described acceptance division is set at a satellite mode or multichannel pattern, when described acceptance division is set to a satellite mode, the quantity of the positional information satellite that can catch simultaneously and decode is set to one, when described acceptance division was set to the multichannel pattern, the quantity of the positional information satellite that can catch simultaneously and decode was set to a plurality of.
In the present invention, when acceptance division catching position information satellite, set satellite mode of catching a positional information satellite and the multichannel pattern of catching a plurality of positional information satellites by receiving channel setting portion.Therefore, receiving satellite signal and reduce power consumption at short notice can reduce the influence of reception environment simultaneously and improves the probability that successfully receives.
That is, under by the detected signal condition of signal condition test section, for example when signal intensity (incoming level) is above up to predetermined value,, also can decodes and obtain time information even can only catch a positional information satellite with a satellite mode.That is, when a satellite mode, under, the signal intensity condition with higher good, can obtain the moment/all information at short notice and reduce power consumption at reception environment.But, when only handling with a satellite mode, under the situation that reception environment worsens, signal intensity reduces, constantly/probability that obtains of all information reduces, cause the decoding processing of repetition satellite acquisition processing and NAV data, power consumption increases so time of reception is elongated.
On the other hand, when only receiving processing with the multichannel pattern, under the good situation of reception environment, compare with a satellite mode, to cause power consumption to increase, but under the situation that reception environment worsens, signal intensity reduces, can improve the probability that obtains of the moment/all information, compare with a satellite mode, can shorten time of reception and suppress power consumption.
Therefore, as the present invention, if select a satellite mode and multichannel pattern according to signal condition, then can shorten the average received time and reduce power consumption, simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, can reduce the influence of reception environment and improve successfully the probability that receives.
In the present invention, preferred described receiving channel setting portion is made as described acceptance division a satellite mode when beginning to receive, catch a positional information satellite, utilize described signal condition test section to detect the signal condition of the positional information satellite that captures with a satellite mode, according to detected described signal condition, the state that is chosen in a described satellite mode continues situation about handling and the situation that changes the multichannel pattern from a satellite mode over to down.
In the present invention, when beginning to receive, at first handle with a satellite mode, change the multichannel pattern according to signal condition at this moment over to from a satellite mode, so if signal condition is good, then can under the state of a satellite mode, carries out satellite seizure and signal decoding and handle.Therefore, can obtain the moment/all information and reduce power consumption at short notice.
On the other hand,, then can change the multichannel pattern over to, catch a plurality of positional information satellites and decoded signal,, can shorten time of reception and suppress power consumption so can improve the probability that obtains of the moment/all information if signal condition is bad.
In the present invention, preferred described receiving channel setting portion is when described acceptance division is set to a satellite mode, if the signal intensity of the positional information satellite that captures then changes the multichannel pattern over to less than setting value.
In the present invention, carry out from a satellite mode to the changing over to of multichannel pattern, so can suitably carry out the selection of a satellite mode and multichannel pattern according to the signal intensity of the positional information satellite that captures.Therefore, can improve the probability that obtains of the moment/all information, can shorten time of reception and suppress power consumption.
At this moment, preferred described receiving channel setting portion sets the receive channel quantity under the described multichannel pattern according to the signal intensity of the positional information satellite that captures.
In the present invention, for example in signal intensity (incoming level) be-when 133dBm is above, handle with a satellite mode, be-137 at incoming level～-during 133dBm, under the multichannel pattern, half of the quantity that can catch acceptance division simultaneously is (for example if can catch the acceptance division of 8 channels of 8 satellites simultaneously, then get its half be " 4 ") be made as the seizure number of satellite, if incoming level is less than-137dBm, then the quantity that can catch simultaneously (if the acceptance division of 8 channels then is made as " 8 ") being made as the seizure number of satellite gets final product.
According to such the present invention, when the multichannel pattern, under the bigger situation of signal intensity, reduce the quantity of the satellite of catching simultaneously, so correspondingly can reduce power consumption.And, because signal intensity is bigger, thus even reduce and catch number of satellite, also can improve can decoded signal probability.
On the other hand, when the multichannel pattern,, then increase simultaneously the quantity of the satellite of catching if signal intensity is smaller, thus can improve can decoded signal probability, can eliminate the search again of satellite and decoding processing again.
Therefore, in the present invention, adjust receive channel quantity, can improve the average acquiring probability of the moment/all information thus, can shorten time of reception and suppress power consumption according to signal intensity.
In addition, dBm is as 0dBm, for example-130dBm=1 * 10 1mW -13MW.
In the present invention, preferred described receiving channel setting portion is when described acceptance division is set to a satellite mode, in the signal intensity of the positional information satellite that captures more than the setting value but under the situation of the time information of in the predefined decoding overtime judgement time, can not decoding, change the multichannel pattern over to from satellite-signal.
In the present invention, when a satellite mode, in the decoding overtime judgement time, carry out the overtime judgement whether decoding processing has finished, so can eliminate useless processing.That is, as wrist-watch, be worn on the time set that the user go up to move, even signal intensity is bigger when catching satellite, but when the decoding time information, exist the satellite that captures by buildings block wait, signal intensity reduction and situation that can not decoded signal.During this situation,, might increase power consumption and can not obtain time information if continue decoding processing up to the signal that can receive from the satellite that captures.
To this, in the present invention, when a satellite mode,, then change the multichannel pattern over to and handle if decoding processing is overtime, the possibility of obtaining time information so can catch other satellites increases.
Therefore, can improve the probability that obtains of the moment/all information, can shorten time of reception and suppress power consumption.
In the present invention, preferred described receiving channel setting portion sets the overtime judgement time of described decoding according to the signal intensity of the described positional information satellite that captures.
In the present invention, for example when a satellite mode, during greater than-133dBm, set the short overtime judgement time of decoding in signal intensity (incoming level), be-137 at incoming level～-during 133dBm, set the overtime judgement time of decoding of length.
And this overtime judgement time of decoding can also be adjusted according to the type of the time information that will obtain.For example, when the positional information satellite was gps satellite, it was all sequence number data of the Z enumeration data and the information in conduct week that time information comprised since the elapsed time in a week, and all sequence number data receive 1 time and get final product between one-period.Therefore, only obtaining under the situation that the Z enumeration data gets final product,, for example can be made as 12 seconds,, for example can be made as 24 seconds setting the long overtime judgement of decoding during the time setting the short overtime judgement of decoding during the time.And, obtaining under Z enumeration data and all sequence number data conditions, setting the short overtime judgement of decoding during the time, for example can be made as 60 seconds, setting the long overtime judgement of decoding during the time, for example can be made as 120 seconds.
In the present invention, set the decoding overtime judgement time according to signal intensity, thus can be more rapidly and carry out the overtime judgement of decoding processing exactly, can prevent to continue useless reception, can reduce power consumption.
In the present invention, preferred described receiving channel setting portion is when described acceptance division is set to a satellite mode, amplitude of fluctuation in the signal intensity of the positional information satellite that the captures signal intensity more than setting value but when decoding described satellite-signal surpasses under the situation of setting amplitude, changes the multichannel pattern over to.
In the present invention, whether the amplitude of fluctuation of decision signal intensity surpasses the setting amplitude, so blocked by the shade of building at the positional information satellite that captures and to make and to wait by the time decode time is overtime under the situations such as intensity reduction of received signal that promptly decidable is difficult to obtain the moment/all information.And, in this case, change the multichannel pattern over to and continue to handle, thus can improve can the time of reception/probability of all information.
In the present invention, preferably when described acceptance division was set to the multichannel pattern, described satellite seizure control part was a plurality of scopes with the seizure frequency setting of positional information satellite, carries out the seizure of positional information satellite in each frequency range.
If in a plurality of frequency ranges, carry out the seizure of positional information satellite, then can search for each positional information satellite at the high elevation angle, the middle elevation angle, the low elevation angle.Therefore, for example under the situation about being covered by the roof in the top side, sky, also can catch the positional information satellite that is positioned at vergence direction and obtain time information, can reduce the restriction in the place that can receive, can improve the probability that can receive and reduce power consumption.
In addition, when clock signal has deviation, can not only receive the signal of the positional information satellite at the low elevation angle, the signal of the positional information satellite at the elevation angle and the high elevation angle in can also receiving can be caught satellite and obtains the probability of time information and reduce power consumption so can be improved.
In the present invention, preferably when described acceptance division is set to the multichannel pattern, described satellite catch control part under the situation that can capture the positional information satellite of setting quantity or the signal intensity of the positional information satellite that captures under the situation more than the setting value, finish satellite and catch processing, described decoding control section is caught after processing finishes at satellite, the satellite-signal of the positional information satellite that decoding captures.
In the present invention, when the multichannel pattern, under the situation that captures the positional information satellite of setting quantity, finish satellite and catch the satellite-signal of handling and decode, so in the signal intensity of the satellite that captures is setting value when following, also can improve the probability of the satellite-signal of can decoding.
On the other hand, when the multichannel pattern, quantity at the positional information satellite that captures does not reach under the situation of setting quantity, in signal intensity is that setting value is when above, also finish satellite and catch the satellite-signal of handling and decode, even reduce the satellite-signal of also can decoding so catch number of satellite, can shorten obtaining the processing time and reducing power consumption of the moment/all information.
In the present invention, preferably when described acceptance division is set to the multichannel pattern, described satellite is caught control part and is handled according to the seizure of each receive channel executing location information satellite, described decoding control section is carried out the decoding processing of satellite-signal from the positional information satellite that can capture, and whether judgement can decode and obtain time information, described satellite catches that control part can be decoded and when obtaining time information in any one receive channel, finish satellite and catch and handle.
In the present invention, when the multichannel pattern, in the time can and obtaining time information from the satellite-signal decoding of the positional information satellite that can capture, finish satellite and catch processing, so do not need to catch the positional information satellite of setting quantity, can shorten obtaining the processing time and reducing power consumption of the moment/all information.
Time set of the present invention is characterised in that, have inside time information generating unit that generates inner time information and the time information correction unit of proofreading and correct described inner time information, the time information that described time information correction unit utilizes described time information generating unit to generate according to the satellite-signal that is received by described acceptance division, proofread and correct described inner time information, described moment display part shows described inner time information.
According to the present invention, receiving satellite signal and reduce power consumption at short notice can reduce the influence of reception environment simultaneously and improves the probability that successfully receives.
Therefore, according to time set of the present invention, can be according to proofreading and correct from the satellite-signal of positional information satellite to constantly accurately, the while can be reduced power consumption and be realized the miniaturization of the long lifetime and the battery of battery life.Therefore, be particularly suitable for portable type time set as wrist-watch and pocket-watch.
Time set of the present invention has: acceptance division, and its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described reception control part has: detection unit, it judged the reception environment of time set before receiving processing; And search pattern selection portion, when it receives processing at described acceptance division, result of determination according to described detection unit is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, wherein, a described satellite acquisition pattern is used to catch a positional information satellite, and obtain time information according to satellite-signal from this positional information satellite transmission, described a plurality of satellite acquisition pattern is used to catch a plurality of positional information satellites, and obtains time information according to the satellite-signal of a positional information satellite transmission from a plurality of positional information satellites that capture.
In the present invention, before receiving processing, judge reception environment,, select a satellite acquisition pattern and a plurality of satellite acquisition pattern according to its result of determination by detection unit.That is, be not when receiving, dynamically to select search pattern according to its reception result, but before receiving in advance (statically) select search pattern.
Therefore, handle and when dynamically selecting search pattern actual the reception according to its reception situation, play judgement reception situation and select search pattern to need the time from beginning to receive processing, but in the present invention, can after selecting search pattern, begin to receive, thus after beginning to receive receiving satellite signal and reduce power consumption at short notice.
In addition, select search pattern, improve the power that successfully receives so can reduce the influence of reception environment, can shorten time of reception and reduce power consumption according to the result of determination of detection unit.
That is, signal intensity (incoming level) up to the situation more than the predetermined value under, if reception environment is good,, also can decodes and obtain time information even then only catch a positional information satellite with satellite acquisition pattern.That is, when a satellite acquisition pattern, only catch a satellite and receiving satellite signal and get final product, so under, the signal intensity condition with higher good, can obtain the moment/all information at short notice and reduce power consumption at reception environment.But satellite acquisition pattern causes repeating to catch the processing of other satellites and the received signal of decoding catching a satellite and decoding received signal and can not receive under the situation of correct signal.Therefore, under the situation that signal intensity reduces selecting a satellite acquisition pattern and reception environment to worsen, constantly/probability that obtains of all information reduces, cause the repetition satellite acquisition to be handled and the decoding processing of NSV data, so time of reception is elongated, power consumption increases.
On the other hand, when only receiving processing with a plurality of satellite acquisition patterns, under the good situation of reception environment, compare with a satellite acquisition pattern, will cause power consumption to increase, but worsen and under the situation that signal intensity reduces at reception environment, search for a plurality of satellites and the received signal of decoding simultaneously, so can improve the probability that obtains of the moment/all information, compare with a satellite acquisition pattern, can shorten time of reception and suppress power consumption.
Therefore, as the present invention, if according to the result of determination of detection unit to reception environment, select a satellite acquisition pattern and a plurality of satellite acquisition pattern, then can shorten the average received time and reduce power consumption, simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain moment/all information, can reduce the influence of reception environment and improve the successfully probability of reception.
In the present invention, preferred described time set has the actinometry portion that measures the light quantity that shines time set, whether described detection unit is judged by described actinometry portion and is measured to light quantity more than the predetermined value, when described search pattern selection portion is judged the light quantity that has been measured to more than the predetermined value at described detection unit, select a described satellite acquisition pattern, when judging the light quantity be measured to less than predetermined value, select described a plurality of satellite acquisition pattern.
If have actinometry portion, it is outdoor to judge easily then whether time set is configured in.That is, when solar irradiation is mapped to time set, compare when shining time set with room lighting, the light quantity of irradiation increases.Therefore, time set is provided with optical sensors etc., mensuration shines the light quantity of time set, if the predetermined value that will be used to judge (threshold value) is set at can judge whether the light quantity that determines is sunshine, be whether time set is configured in outdoor value, it is outdoor to judge easily then whether time set is configured in.And, be used to receive reception environment, with indoor to compare outdoor good possibility big, so, by measuring light quantity, can be easily judge whether reception environment is good before handling receiving according to the present invention from the signal of positional information satellite.
At this, as actinometry portion, can use the optical sensors of direct mensuration light quantity, but the solar cell that also can use the irradiation that utilizes light to generate electricity.The generated energy of solar cell changes according to the light quantity that shines solar cell, so if detect the generated energy of solar cell, then can measure light quantity indirectly.And, if with solar cell double as actinometry portion, compare when in addition optical sensors being set, can reduce part count, reduce cost.
In addition, the described threshold value of judgement light quantity for example can be set at 50001x (lux).That is, if daytime is outdoor, even rainy day and cloudy day measure illumination also more than 50001x, and when indoor, owing to use the illumination of fluorescent light etc., so measure illumination below 10001x.Therefore, if be described threshold setting about 50001x, then described detection unit is described threshold value when above measuring illumination, and it is outdoor to judge that time set is configured in.
In the present invention, the translational speed determination part that preferably has the translational speed of measuring time set, whether described detection unit is judged by described translational speed determination part and is measured to translational speed below the predetermined value, when described search pattern selection portion is judged the translational speed that has been measured to below the predetermined value at described detection unit, select a described satellite acquisition pattern, when judging the translational speed be measured to greater than predetermined value, select described a plurality of satellite acquisition pattern.
Like this, according to the present invention,, be stationary state or moving so can judge time set owing to have the translational speed determination part.And when time set was mobile, the position relationship change of itself and positional information satellite for example, was followed moving of time set, might have building between positional information satellite that captures and time set and can not receiving satellite signal.Therefore, when time set remains static, compare when mobile, the possibility that reception environment is good is bigger, so if measure the translational speed of time set, then can be easily judge whether reception environment is good before handling receiving.
In addition, as the translational speed determination part, for example can use acceleration transducer etc.
And the predetermined value (threshold value) about the translational speed judged by described detection unit for example is set at and can judges that the value whether described time set remains static substantially gets final product.For example, when measuring acceleration and judge, if make housing in the peak acceleration of the time per unit of vertical direction during with two shaft vibrations at threshold value 0.98m/s 2(0.1G), then can judge it is,, then can judge to remain static if less than described threshold value in walking.That is, in that being worn on, described time set takes a walk on the wrist and during minute movement, the peak acceleration of the housing of this moment is about 4.9～9.8m/s 2(0.5～1.0G).Therefore, detection unit can judge that time set is in mobile status or stationary state according to the peak acceleration that is measured to whether more than described threshold value.
In the present invention, the storage part that preferably has the orbit information of the described positional information satellite of storage, described detection unit is according to the orbit information that is stored in the described storage part, judgement is in the time point that receives processing can location of capture information satellite, whether the positional information satellite that is positioned at the above high elevation angle of predetermined angular is more than predetermined quantity, described search pattern selection portion judges that at described detection unit the described positional information satellite at the high elevation angle that is positioned at is when predetermined quantity is above, select a described satellite acquisition pattern, when judging, select described a plurality of satellite acquisition pattern less than predetermined quantity.
If the orbit information of each positional information satellite is stored in the storage part, then can before receiving current events, grasp whether there is the positional information satellite that is positioned at the high elevation angle.
And when utilizing time set to receive satellite-signal from the positional information satellite, if be positioned at the positional information satellite at the low elevation angle, then the possibility of being blocked by buildingss such as buildings is bigger.Therefore, catch the positional information satellite that is positioned at the high elevation angle of zenith with respect to time set, compare when being positioned at the positional information satellite that hangs down the elevation angle with seizure, reception environment is good.
Therefore, if according to orbit information detect be positioned at the high elevation angle the positional information satellite whether more than predetermined quantity, then can be easily judge whether reception environment good before handling receiving.
In addition, about described whether be the high elevation angle, for example, if the elevation angle be 60 the degree more than, then can be set at the high elevation angle.
In the present invention, preferred described time set has: the incoming level test section, and it detects the incoming level of the satellite-signal that receives from the positional information satellite; And storage part, its storage is by the detected incoming level of described incoming level test section, described detection unit judges that incoming level when being stored in last time receiving in the described storage part is whether more than predetermined value, the incoming level of described search pattern selection portion when described detection unit judgement last time received is when described predetermined value is above, select a described satellite acquisition pattern, when judging, select described a plurality of satellite acquisition pattern less than predetermined value.
In the present invention, be that predetermined value (when for example-133dBm) above, is handled with a satellite acquisition pattern, if less than predetermined value, then handled with a plurality of satellite acquisition patterns at last time incoming level.
When no matter still manually receiving when automatic reception, the situation together of the environmental facies when generally each receives is in the majority.For example, when the timing of determining in every day received, the situation that reception environment is identical was in the majority.And when manually receiving, for example the user is at every turn in field operation etc., and the situation that reception environment is identical is in the majority.
Therefore, when incoming level last time is higher, incoming level possibility higher and that reception environment is good when next time receive handling is bigger, and when last time incoming level was low, to receive incoming level when handling lower and possibility that reception environment is bad is bigger next time.Therefore, according to incoming level last time, can judge before receiving processing easily whether reception environment is good.
In the present invention, preferred described time set has: the time of reception determination part, and it measures the time of reception that obtains time information from positional information satellite receiving satellite signal; And storage part, the time of reception that its storage is measured to by described time of reception determination part, described detection unit judge when being stored in last time receiving in the described storage part time of reception whether at the fixed time below, described search pattern selection portion judges that at described detection unit time of reception when last time receiving is in the described schedule time when following, select a described satellite acquisition pattern, when judgement is longer than the schedule time, select described a plurality of satellite acquisition pattern.
In the present invention, be predetermined value (for example 3 minutes) when following in the reception processing time last time, then handle with a satellite acquisition pattern, when longer, then handle getting final product with a plurality of satellite acquisition patterns than predetermined value.
When no matter still manually receiving when automatic reception, the situation together of the environmental facies when generally each receives is in the majority.And if reception environment is good, then time of reception shortens, if reception environment worsens, then time of reception is elongated.Therefore, under the situation that time of reception is long, reception environment is not so well that can judge last time, the bad possibility of reception environment when next time receive handling is bigger, under the situation that time of reception is short, reception environment is good that can judge last time, the possibility that the reception environment when next time receiving processing is good is bigger.Therefore, according to time of reception last time, can judge before receiving processing easily whether reception environment is good.
In the present invention, preferably has the operable external operating unit of user, described detection unit judges whether utilize described external operating unit to carry out the selection operation of any one pattern in a satellite acquisition pattern or a plurality of satellite acquisition pattern, when described search pattern selection portion has been carried out the selection operation of a satellite acquisition pattern in described detection unit judgement, select a described satellite acquisition pattern, when the selection operation of a plurality of satellite acquisition patterns has been carried out in judgement, select described a plurality of satellite acquisition pattern.
The user is usually when receiving operation, can judge that present place for example is the environment of open, the easy reception of sky from the signal of positional information satellite, still have buildings and roof etc. and be difficult to receive environment from the signal of positional information satellite.
Therefore,,, then can select the possibility of pattern of corresponding reception environment bigger, can improve the probability that obtains of the moment/all information, can shorten time of reception and suppress power consumption if select search pattern by manual operation according to user's judgement.
At this moment, when preferred described search pattern selection portion is not carried out the selection operation of any pattern in a satellite acquisition pattern and a plurality of satellite acquisition pattern in described detection unit judgement, select a described satellite acquisition pattern.
According to this structure, when the user receives operation, even forgotten the selection operation of search pattern, also can carry out to receive and handle with a satellite acquisition pattern of initial setting, for example do not compare, can not reduce operability with when not carrying out the selection operation of search pattern, just not carrying out the situation that receives processing.
In the present invention, preferred described search pattern selection portion is at first carried out the moment when receive handling after the time set energized, irrelevant with the result of determination of described detection unit, selects a plurality of satellite acquisition patterns.
After energized just, the time of clock and watch exists the possibility of deviation bigger, so need reliably the information time of reception.Therefore, during first time of reception, if select a plurality of satellite acquisition patterns, the possibility that then can obtain time information reliably increases the moment that can correctly proofread and correct time set after energized just.
The satellite signal reception method of time set of the present invention, this time set has: acceptance division, its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described satellite signal reception method comprises: the satellite of catching described positional information satellite is caught step; Signal condition detects step, detects the signal condition of catching the positional information satellite that captures in the step at described satellite; Decoding step, decoding is from catching the satellite-signal of the positional information satellite transmission that captures the step at described satellite; And receiving channel setting step, according to detecting detected signal condition in the step in described signal condition, the quantity that described acceptance division is set at the positional information satellite that can catch simultaneously and decode is that the quantity of a satellite mode of one or the positional information satellite that can catch simultaneously and decode is any one pattern in a plurality of multichannel pattern.
According to the present invention, when catching position information satellite, in the receiving channel setting step, set satellite mode of catching a positional information satellite and the multichannel pattern of catching a plurality of positional information satellites, so receiving satellite signal and reduce power consumption at short notice can reduce the influence of reception environment simultaneously and improves the probability that successfully receives.
Therefore, identical with described time set, can shorten the average received time and reduce power consumption, simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, can reduce the influence of reception environment and improve successfully the probability that receives.
The satellite signal reception method of time set of the present invention, this time set has: acceptance division, its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described satellite signal reception method comprises: determination step, the reception environment of judgement time set before receiving processing; And search pattern is selected step, when described acceptance division receives processing, result of determination according to described detection unit is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, wherein, a described satellite acquisition pattern is used to catch a positional information satellite, and obtain time information according to satellite-signal from this positional information satellite transmission, described a plurality of satellite acquisition pattern is used to catch a plurality of positional information satellites, and obtains time information according to the satellite-signal of a positional information satellite transmission from a plurality of positional information satellites that capture.
According to the present invention, identical with described time set, can after selecting search pattern, begin to receive, thus after beginning to receive receiving satellite signal and reduce power consumption at short notice.In addition, owing to judge reception environment and select search pattern, so receiving satellite signal and reduce power consumption at short notice can reduce the influence of reception environment simultaneously and improves the probability that successfully receives.
Therefore, identical with described time set, can shorten the average received time and reduce power consumption, simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, can reduce the influence of reception environment and improve successfully the probability that receives.
Description of drawings
Fig. 1 is the skeleton diagram of the wrist-watch of the band GPS that the present invention relates to of expression.
Fig. 2 is the block diagram of circuit structure of the wrist-watch of expression band GPS shown in Figure 1.
Fig. 3 is the generalized schematic of the structure of explanation gps satellite signal.
Fig. 4 is the generalized schematic of expression gps satellite signal.
Fig. 5 is the block diagram of structure of the reception control part of expression the 1st embodiment.
Fig. 6 is the process flow diagram that the reception of expression the 1st embodiment is handled.
Fig. 7 is the signal intensity and the curve map that obtains the relation of rate and acquisition time of expression satellite-signal.
Fig. 8 is the process flow diagram that the reception of expression the 2nd embodiment is handled.
Fig. 9 is the process flow diagram that the reception of expression the 3rd embodiment is handled.
Figure 10 is the process flow diagram that the reception of expression the 4th embodiment is handled.
Figure 11 is the process flow diagram that the reception of expression the 5th embodiment is handled.
Figure 12 is the block diagram of structure of the reception control part of expression the 6th embodiment.
Figure 13 is the process flow diagram that the reception of expression the 6th embodiment is handled.
Figure 14 is the process flow diagram that the reception of expression the 7th embodiment is handled.
Figure 15 is the process flow diagram that the reception of expression the 8th embodiment is handled.
Figure 16 is the process flow diagram that the reception of expression the 9th embodiment is handled.
Symbol description
The wrist-watch of 1 band GPS; 3 indicators; 4 displays; The 11GPS antenna; 18 receiving circuits; 20 control parts; 27RF portion; 30 base band part; The 40GPS device; 43 driving circuits; 44 time correction devices; 45 display devices; 50,150 receive control part; 51 satellites are caught control part; 52 signal condition test sections; 53 decoding control section; 54 receiving channel setting portions; 151 detection units; 152 search pattern selection portions.
Embodiment
Below, specify preferred implementation of the present invention with reference to accompanying drawing etc.
In addition, because the embodiment of following narration is a preferred concrete example of the present invention, so added preferred technically various qualifications, but as long as be not particularly limited description of the invention in the following description, scope then of the present invention is not limited to these modes.
(the 1st embodiment)
Fig. 1 is the time set that the present invention relates to of expression, promptly with the skeleton diagram of the wrist-watch 1 of gps satellite signal receiving trap (hereinafter referred to as " wrist-watch 1 of band GPS ").Fig. 2 is the block diagram of main hardware structure etc. of the wrist-watch 1 of expression band GPS.
As shown in Figure 1, the wrist-watch 1 of band GPS has the moment display part that is made of dial plate 2 and indicator 3.Part at dial plate 2 is formed with opening, wherein is equipped with the display 4 that is made of LCD display panel etc.
Indicator 3 constitute have second hand, minute hand, hour hands etc., pass through gear drive by stepper motor.
Display 4 is made of LCD display panel etc., except that showing position information such as latitude, longitude and city name, and also display message information.
And, the wrist-watch 1 of band GPS constitute from planned orbit on earth idle loop around a plurality of gps satellites 5 receiving satellite signals, obtain the satellite time information, proofread and correct inner time information, and show that on display 4 position-detection information is a current location.
In addition, gps satellite 5 is examples of the positional information satellite among the present invention, and sky has a plurality of on earth.At present, have approximately 30 gps satellites 5 around.
And, on the wrist-watch 1 of band GPS, be provided with as the table of external operating unit 6, button 7,8.
(circuit structure of the wrist-watch of band GPS)
Below, the circuit structure of wrist-watch 1 of band GPS is described.As shown in Figure 2, the wrist-watch 1 of band GPS constitute have display device 45, GPS device 40, time correction device 44, also bring into play the effect of computing machine.In addition, as shown in Figure 2, a part of structure of display device 45, GPS device 40, time correction device 44 repeats.
Below, each inscape shown in Figure 2 is described.
(structure of GPS device)
As shown in Figure 2, the wrist-watch 1 of band GPS has reception from the satellite-signal of gps satellite 5 transmissions and the GPS device of handling 40.
GPS device 40 has gps antenna 11, wave filter (SAW) 31, receiving circuit 18.Wave filter (SAW) the 31st, bandpass filter is used to extract the satellite-signal of 1.5GHz.Utilize this GPS device 40 to constitute acceptance division of the present invention.
Receiving circuit 18 is used to handle the satellite-signal that is extracted by wave filter 31, has (the Radio Frequency: wireless frequency) 27 and base band part 30 of RF portion.
RF portion 27 has PLL circuit 34, IF wave filter 35, VCO (Voltage ControlledOscillator) 41, ADC (A/D converter) 42, mixer 46, LNA (Low NoiseAmplifier) 47, IF amplifier 48 etc.
And the satellite-signal that is extracted by wave filter 31 mixes with the signal of VCO41 at mixer 46 after LAN47 is exaggerated, and is IF (Intermediate Frequency. intermediate frequency) by frequency reducing.
By IF amplifier 48, IF wave filter 35, be converted into digital signal at mixer 46 mixed IF at ADC (A/D converter) 42.
Base band part 30 has DSP (Digital Signal Processor) 39, CPU (CentralProcessing Unit) 36, SRAM (Static Random Access Memory) 37, RTC (real-time clock) 38.And, on base band part 30, also connecting crystal oscillating circuit (TCXO) 32 with temperature-compensation circuit and flash memory 33 etc.
And base band part 30 is carried out the computing (decoding processing) of satellite-signal by the ADC42 supplied with digital signal from RF portion 27 according to control signal, can obtain satellite time information and position-detection information.
In addition, the clock signal of PLL circuit 34 usefulness is generated by the crystal oscillating circuit (TCXO) 32 of band temperature-compensation circuit.
And RTC38 carries out the progression timing according to the reference clock from TCXO32 output.
(structure of time correction device)
Time correction device 44 has described receiving circuit 18, control part 20, driving circuit 43 and quartz crystal unit 202.Utilize this time correction device 44 to constitute time information correction unit of the present invention.
Control part 20 has storage part 20A, is used to control the driving of GPS device 40, indicator 13, display 4.That is, control part 20 constitutes the reception control part, and it transmits control signal to receiving circuit 18, the reception action of control GPS device (acceptance division) 40.
And storage part 20A is stored in moment data (satellite time information), location data and the inner time information that the base band part 30 of described receiving circuit 18 obtains.
And, in control part 20, be provided with the not shown oscillatory circuit that is connected with quartz crystal unit 202.Generate reference signal by quartz crystal unit 202 and oscillatory circuit, update stored in inside time information among the described storage part 20A according to this reference signal.Therefore, utilize control part 20 and quartz crystal unit 202 to be configured for generating inner inside time information generating unit constantly.
(structure of display device)
Display device 45 constitute have control part 20, storage part 20A, driving circuit 43, quartz crystal unit 202, indicator 3, display 4 etc.Driving circuit 43 has: drive not shown stepper motor and drive the indicator driving circuit of indicator 3 and the circuit of display driving of driving display 4.
And, the inside time information that generates by quartz crystal unit 202 and oscillatory circuit, in described storage part 20A, control part 20 is according to the moment data that are stored among the storage part 20A as the information stores of current time, and the demonstration of control indicator 3 and display 4 is constantly.
And, control part 20 adds UTC deviation (current is+14 seconds) to the satellite time information that is obtained by described base band part 30, become the zebra time (UTC) of reaching an agreement on, add in addition be stored in storage part 20A in the relative time difference information of UTC, calculate the local moment of the wrist-watch 1 that is using band GPS, and be stored among the storage part 20A.Therefore, control part 20 performances generate the effect of the time information generating unit of time information according to the satellite-signal that receives.
And control part 20 is stored among the storage part 20A and after inner time information is updated at the time information that generates according to the satellite-signal that receives, by driving circuit 43 at the time information that shows on the display 4 after proofreading and correct.
In addition, the current time information that control part 20 calculates indicators 3 indications with proofread and correct after the difference of inside time information, and control and, make indicator 3 move this time difference by driving circuit 43 drive stepping motor, thus the moment after indicator 3 indications are proofreaied and correct.
The wrist-watch 1 of the band GPS of Gou Chenging is by the driven by power that provides from the secondary cell 24 that can charge like this.
That is, charging is passed through 28 pairs of secondary cell 24 charging powers of charging control circuit with coil 22.Secondary cell 24 provides driving electric by voltage stabilizer 29 to time correction device 44 grades.
As described above, the clockwork of present embodiment is so-called electronic watch.
(explanation of navigation message)
At this, illustrate from the navigation message of the signal (satellite-signal) of gps satellite 5 transmissions.
Fig. 3, the 4th, the generalized schematic of expression gps satellite signal.
As shown in Figure 3, send signal from each gps satellite 5 with 1 frame data (30 seconds) unit.These 1 frame data have 5 sub-frame datas (1 sub-frame data is 6 seconds).Each sub-frame data has 10 words (1 word is 0.6 second).
And the word of the front of each sub-frame data is the TLM word that stores TLM (Telemetry word) data, and as shown in Figure 4, the front in described TLM word stores the preamble data.
And the word after TLM is the HOW word that stores HOW (hand over word) data, stores the GPS time information (satellite time information) of the gps satellite that is called as TOW (Time of week, be also referred to as " Z counting ") in its front.
The GPS time information utilizes stopwatch to show from elapsed time of 0 o'clock on Sunday weekly, is returned as 00 o'clock of next all Sunday.That is, the GPS time information be since a week show weekly second unit information, the elapsed time is the number that utilizes unit representation in 1.5 seconds, is called as Z counting or Z enumeration data, also is the means that the wrist-watch 1 of band GPS is learnt current time.
And the digital data of subframe 1 shown in Figure 3 comprises the word of satellite revisal data such as storing all sequence number data (WN) and satellite health status information (SVhealth) data etc.
All sequence number data are the information that expression comprises the week of current GPS time information.That is, the starting point of GPS time information is the UTC 00:00:00 in 6 days January in 1980 of (agreement zebra time), from the Zhou Weizhou sequence number 0 of this day beginning.And by obtaining the data of all sequence numbers and elapsed time (second), receiver side can obtain the GPS time information.
And all sequence number data are the data that are updated with all units.
Therefore, at receiver side, obtaining all sequence number data, and counting under the situation in the elapsed time of the time of obtaining this sequence number data in week, even do not obtain all sequence number data once more, the also current all sequence number data that can distinguish gps satellite according to all sequence number data of being obtained and elapsed time.Therefore, if obtain the Z enumeration data, then can estimate and learn that current GPS constantly.For this reason, GPS device 40 only obtains the Z enumeration data usually when obtaining time information.
The navigation message that comprises in the signal from gps satellite be frame data (prime frame structure) be 50bps, the data of total bit number 1500 bits as prime frame.
And these prime frame data are split into 5 sub-frame datas of each 300 bit (300bit).
And 1 frame data are equivalent to 30 seconds.Therefore, in the sub-frame data is for being equivalent to 6 seconds data.As mentioned above, Z counting (TOW) data that in two words in the front of this each sub-frame data, comprise TLM word, HOW word.And the Z enumeration data is according to each data of 6 seconds in sub-frame data interval from subframe 1 beginning.That is, subframe 1～subframe 5 has Z counting (TOW) data of TLM word, HOW word.These Z counting (TOW) data become the time information of next sub-frame data.For example, the Z enumeration data of subframe 1 becomes the moment data of subframe 2.
And, from the satellite-signal of gps satellite 5 be navigation message shown in Fig. 3,4, be the TOW, each sub-frame data of preamble data and HOW word, for example comprise satellite revisal data etc., ephemeris (the concrete orbit information of each gps satellite 5), yearbook (all concise and to the point orbit informations of gps satellites 5) and the UTC data (world's agreement temporal information etc.) of all sequence number data and satellite health status data.More specifically, the sub-frame data of navigation message is subframe 1～subframe 5, these 5 sub-frame datas as unit configuration frame data.And sub-frame data utilizes 1～10 digital data formation as mentioned above.
Therefore, the HOW data are that the Z counting sent at interval with 6 seconds, and all sequence number data, ephemeris parameter and yearbook parameter sent at interval with 30 seconds.
According to top described transmission, the reception of the satellite-signal of present embodiment is synchronous with the C/A code phase of the satellite-signal that sends from each gps satellite 5 from the signal of gps satellite 5.
That is,, in base band part 30, need signal Synchronization with gps satellite 5 for frame data of obtaining this gps satellite 5 etc.
During this situation, especially, adopt C/A sign indicating number (1023chip (1ms)) in order to realize the synchronous of 1ms unit.This C/A sign indicating number (1023chip (1ms)) is intrinsic, but because of earth-circling each gps satellite 5 differences.
Therefore, when receiving the satellite-signal of specific gps satellite 5, in GPS device 40, produce gps satellite 5 intrinsic C/A sign indicating number and phase-locking, thereby can receive.
And, if synchronous, then can receive preamble data, the HOW word of the TLM word of sub-frame data with C/A sign indicating number (1023chip (1ms)), can obtain the Z enumeration data (time information) of HOW word.
In addition, about position-detection information, the ephemeris parameter of obtaining the satellite-signal of 3～4 satellites gets final product.At this, ephemeris parameter receives 600 bits by the preamble from the subframe 2 that sent every 30 seconds and obtained in promptly about 12 seconds.
The satellite-signal of gps satellite 5 is that navigation message is according to top described formation.
(receiving the system architecture of control part)
Below, the system architecture of reception control part 50 of the present invention is described according to Fig. 5.Fig. 5 mainly represents to utilize the functional block of the program realization of being carried out by control part 20.
That is, receive control part 50 and have satellite seizure control part 51, signal condition test section 52, decoding control section 53 and receiving channel setting portion 54.
(time information receives and handles)
Below, with reference to the reception action of the wrist-watch 1 of the flowchart text band GPS of Fig. 6.
Time information shown in Figure 6 receives to be handled when the user has carried out receiving operation and carries out when arriving predefined time of reception.Set and for example refer at 2 o'clock in the morning and at 3 o'clock in the morning or at 7 o'clock in the morning and at 8 o'clock in the morning etc. constantly.Being set at 2 o'clock in the morning and at 3 o'clock is because the wrist-watch 1 of band GPS is taken off from the user, so that the static possibility that is placed on table by the window etc. of installment state is not bigger, and the use of electric product etc. is less, can alleviate The noise, so the good possibility of electric wave reception environment is bigger.And, being set at 7 o'clock in the morning and at 8 o'clock and being because be in the work hours section, the user of wrist-watch 1 who wears band GPS is at outdoor and easy receiving satellite signal.But, be not limited to these constantly, also can set automatic reception constantly by the user.
When carrying out this time information reception processing, the satellite that receives control part 50 is caught control part 51 will be as the receiving mode of the GPS device 40 of acceptance division, be set at the gps satellite 5 that will catch is defined as a satellite mode (single-channel mode) of one, and begin to receive the satellite-signal (S11) that sends from gps satellite 5.Specifically, satellite is caught control part 51 control GPS devices 40, and in order to be gps signal from gps antenna 11 receiving satellite signals, the figure of the C/A sign indicating number of the gps satellite 5 that generation is narrated later also begins to receive.And base band part 30 is obtained the correlation of each C/A sign indicating number and the satellite-signal that receives, the gps satellite 5 that seizure can be synchronous.
And satellite is caught control part 51 and is judged whether to capture gps satellite 5 (S12).In S12, in the time can not catching satellite, satellite is caught control part 51 and is confirmed whether satellite pull-in times (search time) reach the predefined time (searching for the overtime judgement time) above, i.e. whether overtime (S13).
Whether in addition, satellite is caught control part 51 overtime according to following described judgement.That is, the seizure processing time of a satellite is about hundreds of milliseconds.And the state that never obtains the orbit information (yearbook parameter) of whole satellites at the wrist-watch 1 of band GPS carries out satellite when catching the cold start of handling, and will cause random search gps satellite 5.During this situation,, i.e. under the situation of the spended time of the seizure of a satellite, can in about about 2 seconds, capture satellite for example from gps satellite 5 sequential searches of No.1 and can capture under the situation of gps satellite 5 of No.30.Therefore, satellite is caught control part 51 after S11 begins to receive, if still fail to capture satellite through the overtime judgement time of predefined search (for example 3 seconds), then is judged to be overtime in S13.
In S13, be judged to be overtime after, satellite is caught GPS that control part 51 stops GPS device 40 and is received and handle (S14).And satellite is caught control part 51 takes defeat demonstrations such as display 4, and control part 20 makes indicator 3 take the needle according to current inside constantly, and shows the inner moment (S15).
On the other hand, judge in S12 when having captured satellite that the incoming level (signal intensity) that signal condition test section 52 is judged the gps satellite 5 that captures is whether in predefined predetermined value (for example-137dBm) (S16).
In S16, at incoming level is that predetermined value is when above, satellite is caught the satellite acquisition processing that control part 51 finishes GPS device 40, and decoding control section 53 is proceeded under a satellite mode from the decoding processing (S17) of the NAV data of gps satellite 5 receptions that capture.
And in S16, during less than predetermined value, receiving channel setting portion 54 is set at parallel multichannel pattern of catching a plurality of gps satellites 5 with receiving mode at incoming level, and satellite is caught the satellite acquisition that control part 51 continues the multichannel patterns and handled (S18).In the present embodiment, receiving channel setting portion 54 is set at 8 channelling modes that can catch 8 gps satellites 5 simultaneously and receive the NAV data.
And, though satellite catch incoming level that control part 51 and signal condition test section 52 judge the next satellite 5 that captures whether more than predetermined value or whether incoming level can capture predetermined quantity (for example 3 s') satellite 5 (S19) less than predetermined value.
And, when in S19, being judged to be " Yes ", promptly, though the incoming level of the gps satellite 5 that captures more than the predetermined value or incoming level less than predetermined value but can capture under the situation of gps satellite 5 of predetermined quantity (for example 4～8), satellite is caught control part 51 and is finished the satellite acquisition processing, and decoding control section 53 is proceeded under the multichannel pattern from the decoding processing (S17) of the NAV data of gps satellite 5 receptions that capture.
When in S19, being judged to be " No ", promptly, though under the situation that can not capture satellite or can capture satellite incoming level less than predetermined value and its quantity under the situation less than predetermined quantity (for example 3), whether decoding control section 53 judges the time information (S20) of can decoding from the signal of the gps satellite 5 that can capture.
That is, under multi channel situation, can capture a plurality of gps satellites 5, can walk abreast and carry out the decoding processing of NAV data.Therefore, during continuation satellite acquisition processing, can capture in the channel of gps satellite 5, the decoding processing of NAV data is carried out in continuation from the satellite-signal that captures, before the gps satellite 5 of catching predetermined quantity, often can obtain time information and all information from the NAV data of a part of gps satellite 5.Therefore, decoding control section 53 is also confirmed the moment/all information that whether can receive in S20 in the satellite acquisition processing procedure.
When being judged to be " No " in S20, satellite is caught control part 51 and is judged whether passed through the predefined time (overtime judgement time of a plurality of search) (S21).In S21, when under the multichannel pattern, carrying out the satellite acquisition processing,, set the overtime judgement time of described a plurality of search according to whole 5 needed times of gps satellite of search.Therefore, the overtime judgement time of a plurality of search of the multichannel pattern of S21 can be the identical time of the overtime judgement of search time with the satellite mode of S13, when also can be under the multichannel pattern finishing search with the shorter time, is set at the shorter time.
When being judged to be " No " in S21, return the judgement of S19, satellite is caught control part 51 and is judged that whether can continue satellite acquisition handles and the seizure satellite.
And, in S21, being judged to be under the overtime situation, satellite is caught control part 51 and is stopped GPS and receive and handle (S22), and demonstrations such as display 4 taken defeat, and control part 20 makes indicator 3 take the needle according to current inside constantly, and shows the inner moment (S23).
On the other hand, decoding control section 53 is carried out the decoding of NAV data in S17 after, judge the moment/all information (S24) of whether can obtaining.
In addition, decoding control section 53 in S20, S24 usually judgement whether can obtain Z enumeration data and all sequence number data, promptly whether can obtain the moment/all information.But, in the time of in the week after last time obtaining all sequence number data (WN), do not need to obtain once more all sequence number data (WN), in this case, in S20, S24, also can judge and whether can obtain the Z enumeration data.
In S24, judge can not to obtain constantly/during all information, whether the decode time that decoding control section 53 is judged the NAV data overtime (S25).That is, through back of predefined time (decoding the overtime judgement time), still fail to obtain under the situation of the moment/all information, it is bad to be judged to be accepting state after the decoding of beginning NAV data for decoding control section 53.
In addition, decode the overtime judgement time for example when only obtaining with the Z counting that sent at interval in 6 seconds, can be set at 12 seconds～about 24 seconds.And when also obtaining, can be set at 60 seconds with all sequence numbers of sending at interval in 30 seconds～about 120 seconds.
Being judged to be in S25 does not have under the overtime situation, and decoding control section 53 continues to judge the moment/all information (S24) of whether can obtaining.
Be judged to be in S25 under the overtime situation, decoding control section 53 stops GPS and receive to handle (S14), and demonstrations such as display 4 taken defeat, and control part 20 makes indicator 3 take the needle according to current inside constantly, and shows the inner moment (S15).
In S24, be judged to be under the situation that to obtain the moment/all information, decoding control section 53 stops GPS and receives processing (S26), display 4 grades are shown receive successfully, control part 20 takes the needle indicator 3 according to the time information that is obtained, and proofreaies and correct the indication (S27) of indicator 3.
In above present embodiment, at first carry out satellite and catch handle (satellite acquisition pattern) with a satellite mode, if incoming level more than predetermined value, then under the state of a satellite mode, carries out the decoding processing of the NAV data that send from a gps satellite 5 that captures.
On the other hand, if incoming level is less than predetermined value, then change to the multichannel pattern, under the situation of the satellite that can capture predetermined quantity and can capture under the situation that incoming level is the satellite more than the predetermined value, carry out the decoding processing of the NAV data that send from the gps satellite 5 that captures.
(experimental data)
At this, the time and the relevant experimental data of obtaining rate of obtaining time information (Z enumeration data and all sequence number data) during with the multichannel pattern during satellite mode of the graphical representation of Fig. 7.
As shown in Figure 7, the acquisition time of Z enumeration data is short more when incoming level is high more, for example, if incoming level-more than the 137dBm, then can be suppressed in 10～20 seconds under any pattern.
On the other hand, when incoming level reduced, the acquisition time of Z enumeration data was elongated, for example, if incoming level-below the 139dBm, then under any pattern, all to spend and reach 40～70 seconds time, cause in S23, being judged to be overtime.
And the acquisition time of Z enumeration data is short more when incoming level is high more, and this point all is identical under each pattern.But, under a satellite mode (single-channel mode), the rate of obtaining reaches more than 80%, but be at incoming level-situation more than the 135dBm under, become at incoming level-when 135dBm is following, be lowered into ratio with it, the rate of obtaining also reduces, and under the multichannel pattern, the rate of obtaining reaches more than 80%, but at incoming level be-situation more than the 140dBm under, even lower incoming level also can keep the higher rate of obtaining.
On the other hand, receiving the current sinking of handling is the relative value that a satellite mode is made as 1 o'clock, is 1.5～3.0 during the multichannel pattern.In addition, under the multichannel pattern, be issued to about 1.5 times, be issued to about 3.0 times in the indoor relatively poor situation of reception environment that waits at the more open environment of zenith.
(effect of embodiment)
According to such present embodiment, has following effect.
(1) wrist-watch 1 of band GPS at first carries out the satellite acquisition processing with a satellite mode, when incoming level (signal intensity) is above up to predetermined value, under the state of a satellite mode, carry out the decoding of NAV data, low to the time at incoming level less than predetermined value, change the multichannel pattern over to and carry out the decoding of NAV data, so can reduce the influence of reception environment, can improve the probability that can obtain the moment/all information, can reduce power consumption.
That is, only receiving when handling, under, the incoming level condition with higher good, can obtain the moment/all information at short notice, can reduce power consumption at reception environment with a satellite mode.But, worsen at reception environment, when incoming level reduces, constantly/probability that obtains of all information reduces, cause the repetition satellite acquisition to handle and the decoding processing of NAV data power consumption increase so time of reception is elongated.
On the other hand,, under the situation that reception environment worsens, incoming level reduces, also can improve the probability that obtains of the moment/all information, compare, can shorten time of reception and suppress power consumption with a satellite mode only receiving when handling with the multichannel pattern.But, when reception environment is good, compare with a satellite mode, will cause power consumption to increase.
To this, in the present embodiment, receiving channel setting portion 54 is set, value according to incoming level is selected a satellite mode and multichannel pattern, reduce power consumption so can shorten the average received time, simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, can reduce the restriction of reception environment and improve convenience.
(2) in addition, with multichannel pattern search satellite the time, when not satisfying the condition of S19, in S20, judge the moment/all information of whether can obtaining.Therefore, in S20, can obtain under the situation of the moment/all information, can stop GPS and receive handle (S26), thus correspondingly can shorten the multichannel pattern time the moment/average acquiring processing time of all information, can reduce power consumption.
(3) wrist-watch 1 of band GPS is worn on the user and goes up use, so under the situation about being blocked easily from the signal of gps satellite 5 and inferior owing to just being difficult to receive the situation of signal of gps satellite 5 in walking being in around the buildings such as building, compare with the clock and watch such as clock on being fixed on buildings, reception environment changes easily.Even if when the wrist-watch 1 of the band GPS of present embodiment worsens at such reception environment, change the multichannel pattern over to from a satellite mode, can obtain the moment/all information at short notice thus, can reduce power consumption.Therefore, the wrist-watch 1 of the band GPS of present embodiment is particularly suitable for the portable clock as wrist-watch and pocket-watch.
(the 2nd embodiment)
Below, the 2nd embodiment of the present invention is described.In addition, in following each embodiment, for the identical or the same structure of aforementioned other embodiments, give same-sign, and omission or simplified illustration.
The 2nd embodiment is shown in the process flow diagram of Fig. 8, and the difference of itself and aforementioned the 1st embodiment is, sets the overtime judgement time of decode time according to the value of incoming level; And when a satellite mode under the overtime situation of described decode time, change the multichannel pattern over to and do not stop GPS by receiving channel setting portion 54 and receive, other processing are identical with the 1st embodiment with circuit structure.
Below, about the treatment scheme of the 2nd embodiment, mainly with reference to Fig. 8 explanation part different with the 1st embodiment.
In Fig. 8, each processing of S11～S27 is identical with the 1st embodiment, so omit explanation.
On the other hand, in the 1st embodiment, incoming level is that predetermined value is when above in S16, finish satellite acquisition and proceed the decoding processing (S17) of NAV data, but in the 2nd embodiment, after the processing (S31) of setting the overtime time (decoding the overtime judgement time) that is used to judge decoding processing, carry out the processing of S17.
At this, in S31, set the decoding overtime judgement time according to the value of incoming level.For example, in S16, be set at incoming level and be-be judged to be " Yes " when 137dBm is above.
During this situation, in S31, the overtime judgement of the decoding time when only obtaining the Z enumeration data, incoming level for-more than the 137dBm ,-be made as when 133dBm is following 24 seconds, be made as 12 seconds during at incoming level greater than-133dBm.
And, the overtime judgement of the decoding time when also obtaining all information, incoming level for-more than the 137dBm ,-be made as when 133dBm is following 120 seconds, be made as 60 seconds during at incoming level greater than-133dBm.
And in the overtime judgement of the decode time of S25, decoding control section 53 uses the overtime judgement time of setting in S31 of decoding to judge.And, in S25, be judged to be overtime after, change the multichannel pattern over to by receiving channel setting portion 54, carry out to continue the processing (S18) of satellite acquisition.
In addition, in the time of in S19, can capturing a plurality of gps satellite 5, in S31, can it be the overtime judgement of the decoding time that each gps satellite that captures 5 is set decode times to each channel.Because can carry out suitable judgement according to the signal intensity of each gps satellite 5.
And, in S24, in a plurality of gps satellites 5 that capture,, then can be judged to be " Yes " if can obtain the moment/all information from least one gps satellite 5.Because if can obtain one the moment/all information, the i.e. moment of the wrist-watch 1 of recoverable band GPS.
(effect of the 2nd embodiment)
According to the 2nd embodiment, can bring into play the identical action effect in (1)～(3) with described the 1st embodiment.
(4) in addition owing in S31, set the overtime judgement time of the decode time of corresponding incoming level, so can be more accurately and whether promptly judge can the time of reception/all information.That is, when incoming level is higher, as shown in Figure 7, at short notice the time of reception/all information, therefore can set the short overtime judgement time of decoding.And in this case, under the overtime situation of decode time, can judge rapidly can not be from the gps satellite that captures 5 time of reception/all information.Therefore, can shorten and carry out the time that useless reception is handled, can further reduce power consumption.
(5) and, in S25, be judged to be under the overtime situation, unlike the 1st embodiment, stop to receive, but the multichannel pattern that changes S18 over to continues to handle, so can improve can the time of reception/probability of all information, can improve the convenience of clock and watch 1.
Promptly, the wrist-watch 1 that adorns oneself with band GPS the user is during in outdoor walking etc., when the judgement of the incoming level of S16, though can receive the incoming level higher signal, but follow moving of user, existence is blocked by buildings etc. from the signal of this gps satellite 5, and signal intensity reduces and can not obtain the situation of the moment/all information when the decoding processing of NAV data.In this case, in the 2nd embodiment, change the multichannel pattern over to, search for a plurality of gps satellites 5 and carry out the decoding processing of NAV data, increase so can obtain the possibility of the moment/all information, inner clock and watch can be proofreaied and correct for accurate probability constantly improves, so can improve convenience.
(the 3rd embodiment)
Below, the 3rd embodiment of the present invention is described.
The 3rd embodiment is shown in the process flow diagram of Fig. 9, the difference of itself and aforementioned the 1st embodiment is, judge time per unit incoming level amplitude of fluctuation whether at predefined predetermined amplitude with interior (S41), change the multichannel pattern over to when surpassing predetermined amplitude, other processing are identical with the 1st embodiment with circuit structure.
Below, about the treatment scheme of the 3rd embodiment, mainly with reference to Fig. 9 explanation part different with the 1st embodiment.
In Fig. 9, each processing of S11～S27 is identical with the 1st embodiment, so omit explanation.
And, in the 3rd embodiment, between S17 and S24, signal condition test section 52 judge time per units incoming level amplitude of fluctuation whether at predefined predetermined amplitude with interior (S41).In S41, for example judge that whether the change of the incoming level of per second is ± 3dBm.
In S41, if more than predetermined amplitude, then can supposing gps satellite 5, amplitude of fluctuation blocked etc. by the shade of buildings, so changing the multichannel pattern over to, receiving channel setting portion 54 proceeds to handle (S18).
In addition, in the time of in S19, can capturing a plurality of gps satellite 5, in S41, only in the amplitude of fluctuation of the incoming level of the whole gps satellites 5 that capture during all greater than predetermined amplitude, be judged to be " No ", if the amplitude of fluctuation that has an incoming level at least in predetermined amplitude, then is judged to be " Yes ".Because if there is the less gps satellite of the amplitude of fluctuation of incoming level 5, the possibility that then can obtain the moment/all information is bigger, so once more with in S18, carry out comparing when satellite acquisition is handled, can obtain the moment/all information at short notice, can further reduce power consumption.
(effect of the 3rd embodiment)
According to the 3rd embodiment, can bring into play the identical action effect in (1)～(3) with described the 1st embodiment.
(6) in addition, in S41, judge the amplitude of fluctuation of the incoming level of time per unit, so when the gps satellite 5 that captures is blocked, makes that by the shade in building the intensity of received signal reduces, needn't wait by the time decode time is overtime, promptly decidable is difficult to obtain the moment/all information.And if be judged to be " No " in S41, the multichannel pattern that then changes S18 over to continue to be handled, thus can improve can the time of reception/probability of all information, can improve the convenience of clock and watch 1.
(the 4th embodiment)
Below, the 4th embodiment of the present invention is described.
The 4th embodiment is shown in the process flow diagram of Figure 10, the difference of itself and aforementioned the 1st embodiment is,, set the satellite of multichannel pattern according to the value of this incoming level and catch quantity (S51) during less than predetermined value at incoming level, other processing are identical with the 1st embodiment with circuit structure.
Below, about the treatment scheme of the 4th embodiment, mainly with reference to Figure 10 explanation part different with the 1st embodiment.
In Figure 10, each processing of S11～S27 is identical with the 1st embodiment, so omit explanation.
And, in the 4th embodiment, in S16, be judged to be incoming level less than predetermined value (for example less than-133dBm) time, receiving channel setting portion 54 sets catches channel quantities (S51).
At this, in S51, if for example incoming level less than-133dBm and also-more than the 137dBm, then receiving channel setting portion 54 will catch channel quantity and be set at and can catch quantity/2.For example, when receiving circuit is 8 channels, be 8 owing to can catch quantity, be set at " 8/2=4 " so catch channel quantity.
On the other hand, during less than-137dBm, preferably catch more GPS satellites 5, be set at the maximum quantity that to catch so channel quantity will be caught by receiving channel setting portion 54 at incoming level.For example, when receiving circuit is 8 channels,, be set at " 8 " so catch channel quantity because the maximum quantity that can catch is 8.
And in S19, satellite is caught control part 51 and is judged the gps satellite 5 that whether can capture the quantity of setting in S51.
(effect of the 4th embodiment)
According to the 4th embodiment, can bring into play the identical action effect in (1)～(3) with described the 1st embodiment.
(7) in addition, in S51, set and catch channel quantity, reduce power consumption, can improve the probability that can obtain the moment/all information simultaneously so can shorten the averaging time of catching the gps satellite 5 of setting quantity.
That is, though the incoming level of the gps satellite 5 that captures with a satellite mode in S16 less than predetermined value, but to a certain extent under the condition with higher, it is higher that the seizure number of satellite of multichannel pattern can obtain the probability of the moment/all information at least.And, because it is less to catch number of satellite, compare during with the satellite of catching the maximum quantity that can catch, can shorten to receive and handle and reduce power consumption.
And, when the incoming level of the gps satellite 5 that captures with a satellite mode hangs down, increase the seizure number of satellite of multichannel pattern, so can improve the probability that can obtain the moment/all information.
Therefore, if the seizure number of satellite when setting the multichannel pattern according to the value of incoming level then can improve the probability that can obtain the moment/all information and reduce power consumption.
(the 5th embodiment)
Below, the 5th embodiment of the present invention is described.
The 5th embodiment is shown in the process flow diagram of Figure 11, the difference of itself and aforementioned the 1st embodiment is, at incoming level during less than predetermined value, and the setting search frequency, with the frequency search gps satellite 5 of this setting, other processing are identical with the 1st embodiment with circuit structure.
Below, about the treatment scheme of the 5th embodiment, mainly with reference to Figure 11 explanation part different with the 1st embodiment.
In Figure 11, each processing of S11～S27 is identical with the 1st embodiment, so omit explanation.
And, in the 5th embodiment, when in S16, be judged to be incoming level less than predetermined value (for example less than-133dBm) time, satellite is caught control part 51 setting search frequencies (S61).
In S61, as the frequency f 0 (1575.42MHz) of satellite-signal of the gps satellite 5 on basis as benchmark, be set at search gps satellite 5 in following 3 kinds of frequency ranges, that is, f0 is the 1st frequency range of ± 0～1.5kHz relatively, f0 is the 3rd frequency range of ± 3.0～4.5kHz for the 2nd frequency range of ± 1.5～3.0kHz, relative f0 relatively.
That is, the frequency (transmission frequency) of the satellite-signal that sends from gps satellite 5 is identical frequency f 0 all satellites.But the receive frequency in the receiving equipment changes according to the connect elevation angle of receiving unit of gps satellite 5.This is because Doppler effect etc. are influential to receive frequency.
Specifically, when being positioned at gps satellite 5 received signals of zenith from the receiving unit that connects, Doppler displacement is 0, and the error of the relative transmission frequency of receive frequency is 0.
On the other hand, above-mentioned Doppler displacement (frequency error) is big more when low more at the elevation angle, and the error of transmission frequency increases relatively.And, at gps satellite 5 when the direction near receiving equipment moves, described Doppler displacement is that the direction that frequency improves changes to positive dirction, and when land towards the local horizon away from receiving equipment at gps satellite 5, described Doppler displacement is the direction variation that frequency reduces to negative direction.
Therefore, if in a plurality of frequency ranges, search for gps satellite 5, then can catch the different gps satellite in the elevation angle 5 respectively.
And satellite is caught control part 51 continues the multichannel pattern in 3 kinds of frequency ranges setting by S61 satellite acquisition processing (S18).
Therefore, in the channel that is set to the search processing of carrying out in the 1st frequency range, can search for the gps satellite 5 that captures the high elevation angle.
And, in the channel that is set to the search processing of carrying out in the 2nd frequency range, can search for the gps satellite 5 at the elevation angle in capturing.
In addition, in the channel that is set to the search processing of carrying out in the 3rd frequency range, can search for the gps satellite 5 that captures the low elevation angle.
And, when the clock signal deviations of PLL circuit 34 usefulness is big, if with fixed-frequency, to cause capturing the gps satellite 5 at the low elevation angle, but in the present embodiment, in a plurality of frequency ranges, search for, so, also can capture the gps satellite 5 at the high elevation angle and the middle elevation angle even when described clock signal has deviation.
Except that foregoing, other processing are identical with described the 1st embodiment.
(effect of the 5th embodiment)
According to the 5th embodiment, can bring into play the identical action effect in (1)～(3) with described the 1st embodiment.
(8) in addition, owing in S61, search rate is set at 3 kinds of scopes, so can search for each gps satellite 5 at the high elevation angle and the middle elevation angle and the low elevation angle.Therefore, when for example being covered by the roof, also can catch the gps satellite 5 that is positioned at vergence direction and obtain time information in the top side, sky.Therefore, can reduce the influence of reception environment, can reduce the restriction in the place that can receive, can improve the probability that can receive and reduce power consumption.
(9) and, even when the clock signal of PLL circuit 34 has deviation, not only can receive the signal of the gps satellite 5 at the low elevation angle, and the signal of the gps satellite 5 at the elevation angle and the high elevation angle in can receiving.Therefore, can improve and to catch satellite and obtain the probability of time information and reduce power consumption.
(the 6th embodiment)
Below, the 6th embodiment of the present invention is described.
The 6th embodiment was selected a satellite acquisition pattern (satellite mode) or a plurality of satellite acquisition pattern (multichannel pattern) before receiving processing.
In addition, in the 6th embodiment, the hardware configuration of the wrist-watch 1 of band GPS is identical with described structure shown in Figure 2, so omit explanation.
(receiving the system architecture of control part)
Below, the system architecture of the reception control part 150 of present embodiment is described according to Figure 12.Figure 12 mainly represents to utilize the functional unit of the program realization of being carried out by control part 20.
That is, receive control part 150 and have detection unit 151 and search pattern selection portion 152.
Detection unit 151 is used to judge the reception environment of the wrist-watch 1 of being with GPS, in the present embodiment, constitute judgement whether the utilization table 6 and external operating unit such as button 7,8 selected any one pattern in a plurality of satellite acquisition patterns and the satellite acquisition pattern or whether carried out selection operation.
Search pattern selection portion 152 constitutes when the GPS device 40 as acceptance division receives processing, result of determination according to described detection unit 151 is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, a described satellite acquisition pattern is used to catch a gps satellite 5, and obtain time information according to the satellite-signal that sends from this gps satellite 5, described a plurality of satellite acquisition pattern is used to catch a plurality of gps satellites 5, and the satellite-signal that sends according to a gps satellite from a plurality of gps satellites 5 that capture 5 obtains time information.
(time information receives and handles)
Below, with reference to the reception action of the wrist-watch 1 of the flowchart text band GPS of Figure 13.
Time information shown in Figure 13 receives to be handled when (manually receiving when handling) and arriving predefined time of reception when the user has carried out receiving operation (when automatic reception is handled) and carries out.Set and for example refer at 2 o'clock in the morning and at 3 o'clock in the morning or at 7 o'clock in the morning and at 8 o'clock in the morning etc. constantly.Being set at 2 o'clock in the morning and at 3 o'clock is because the wrist-watch 1 of band GPS is taken off from the user, so that the static possibility that is placed on table by the window etc. of installment state is not bigger, and the use of electric product etc. is less and can alleviate The noise, so the good possibility of electric wave reception environment is bigger.And, being set at 7 o'clock in the morning and at 8 o'clock and being because be in the work hours section, the user of wrist-watch 1 who wears band GPS is at outdoor and easy receiving satellite signal.But, be not limited to these constantly, also can set automatic reception constantly by the user.
After this time information received the processing beginning, the detection unit 151 that receives control part 150 confirmed whether users have carried out the selection operation (S111) of search pattern.And, when having carried out selection operation, judge whether this selection operation is to select a plurality of satellite acquisition patterns (S112).
When detection unit 151 was judged to be the selection operation that has carried out a plurality of satellite acquisition patterns in S112, search pattern selection portion 152 was selected a plurality of satellite acquisition patterns, carried out the reception of time information and handled (S113).
On the other hand, in S111, be judged to be because the user does not carry out the selection operation of search pattern at detection unit 151 under the situation of " No " and since the user carried out the selection operation of a satellite acquisition pattern and in S112, be judged to be under the situation of " No ", search pattern selection portion 152 is selected a satellite acquisition pattern, carries out the reception of time information and handles (S114).
Receive control part 150 when the receiving mode of GPS device 40 being set at a satellite acquisition pattern, receive channel is made as 1 channel, begin to receive the satellite-signal (S114) that sends from gps satellite 5 by search pattern selection portion 152.
And, receive control part 150 when the receiving mode of GPS device 40 being set at a plurality of satellite acquisition pattern by search pattern selection portion 152, receive channel is made as a plurality of, 8 channels for example, begins to receive the satellite-signal (S113) that sends from gps satellite 5.
Each of S113, S114 receive to be handled according to following and describedly specifically carried out.
That is, receive control part 150 control GPS devices 40, in order to be gps signal from gps antenna 11 receiving satellite signals, the figure of the C/A sign indicating number of generation gps satellite 5 also begins to receive.And base band part 30 is obtained the correlation of each C/A sign indicating number and the satellite-signal that receives, the gps satellite 5 that seizure can be synchronous.
And, receive control part 150 and judge whether to capture gps satellite 5 (S115).In S115, in the time can not capturing satellite, receive control part 150 and confirm whether satellite pull-in times (search time) reach the predefined time (the overtime judgement time of search time) above, i.e. whether overtime (S116).
In addition, whether reception control part 150 is overtime according to following described judgement.That is, the seizure processing time of a satellite is about hundreds of milliseconds.And the state that never obtains the orbit information (yearbook parameter) of whole satellites at the wrist-watch 1 of band GPS carries out satellite when catching the cold start of handling, and will cause random search gps satellite 5.During this situation,, i.e. under the situation of the spended time of the seizure of a satellite, can in about about 2 seconds, capture satellite for example from gps satellite 5 sequential searches of No.1 and can capture under the situation of gps satellite 5 of No.30.Therefore, receive control part 150 after beginning to receive,, then in S116, be judged to be overtime if still fail to capture satellite through the overtime judgement time of predefined search (for example 3 seconds).
In S116, be judged to be overtime after, receive GPS that control part 150 stops GPS device 40 and receive and handle (S117).And, receiving control part 150 demonstrations such as display 4 taken defeat, control part 20 makes indicator 3 take the needle according to current inside constantly, and shows the inner moment (S118).
On the other hand, in S115, be judged to be when capturing satellite, receive the satellite-signal that control part 150 decodings receive from the gps satellite 5 that captures, judge the moment/all information (S119) of whether can obtaining.
In addition, receive control part 150 in S119 usually judgement whether can obtain Z enumeration data and all sequence number data, promptly whether can obtain the moment/all information.But, in the week after last time obtaining all sequence number data (WN), do not need to obtain once more all sequence number data (WN), in this case, in S119, also can only judge whether can obtain the Z enumeration data.
In S119, be judged to be can not obtain constantly/during all information, receive decode time that control part 150 judges the NAV data whether overtime (S120).That is, receive control part 150 after the decoding of beginning NAV data through back of predefined time (decoding the overtime judgement time), still fail to obtain under the situation of the moment/all information, it is bad to be judged to be accepting state.
In addition, decode the overtime judgement time for example when only obtaining with the Z counting that sent at interval in 6 seconds, can be set at 12 seconds～about 24 seconds.And when also obtaining, can be set at 60 seconds with all sequence numbers of sending at interval in 30 seconds～about 120 seconds.
Being judged to be in S120 does not have under the overtime situation, receives control part 150 and continues to judge the moment/all information (S119) of whether can obtaining.
Be judged to be in S120 under the overtime situation, receive control part 150 and stop GPS and receive and handle (S117), demonstrations such as display 4 taken defeat, control part 20 makes indicator 3 take the needle according to current inside constantly, and shows the inner moment (S118).
In S119, be judged to be under the situation that to obtain the moment/all information, receive control part 150 and stop GPS reception processing (S121), display 4 grades are shown receive successfully, control part 20 takes the needle indicator 3 according to the time information that obtains, and proofreaies and correct the indication (S122) of indicator 3.
In above-described present embodiment, only when the user has manually selected a plurality of satellite acquisition pattern, carry out a plurality of satellite acquisition treatment S 113, under situation in addition, carry out a satellite acquisition treatment S 114.
(effect of the 6th embodiment)
According to such present embodiment, has following effect.
(10) wrist-watch 1 of band GPS selects a satellite acquisition pattern and a plurality of satellite acquisition pattern to receive processing according to user's selection operation.Therefore, the user is outdoorly to wait that reception environment is good, under the incoming level condition with higher, if select a satellite acquisition pattern, then can obtain the moment/all information at short notice and reduce power consumption in judgement.
On the other hand, under the situation that the user in judgement is when receiving during in indoor reception and in walking etc., reception environment worsens,, then can receive the signal and the decoding of the satellite that incoming level is the highest in a plurality of satellites if select a plurality of satellite acquisition patterns.Therefore, under the situation that reception environment worsens, compare when receiving, can improve the probability that obtains of the moment/all information, compare, can shorten time of reception and suppress power consumption with a satellite acquisition pattern with a satellite acquisition pattern.
Therefore, in the present embodiment, the user judges reception environment, before beginning reception, select a satellite acquisition pattern or a plurality of satellite acquisition pattern according to reception environment in advance, reduce power consumption so can shorten the average received time, even the while under the situation that reception environment worsens, also can be improved the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
That is, only receiving when handling, under, the incoming level condition with higher good, can obtain the moment/all information at short notice and reduce power consumption at reception environment with a satellite acquisition pattern.But, under the situation about worsen at reception environment, incoming level reducing, constantly/probability that obtains of all information also reduces, cause the repetition satellite acquisition to handle and the decoding processing of NAV data power consumption increase so time of reception is elongated.
On the other hand, when only receiving processing with a plurality of satellite acquisition patterns (multichannel pattern), even under the situation that reception environment worsens, incoming level reduces, also can improve the probability that obtains of the moment/all information, compare with a satellite acquisition pattern, can shorten time of reception and suppress power consumption.But, under the good situation of reception environment, compare with a satellite acquisition pattern, will cause power consumption to increase.
To this, in the present embodiment, detection unit 151 and search pattern selection portion 152 are set, value according to incoming level is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, reduce power consumption so can shorten the average received time, even the while under the situation that reception environment worsens, also can be improved the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
(11) in the present embodiment, before receiving processing, judge reception environment,, select a satellite acquisition pattern and a plurality of satellite acquisition pattern by search pattern selection portion 152 according to its result of determination by detection unit 151.
Therefore, receive processing and dynamically select the situation of search pattern to compare with actual according to the reception situation, present embodiment before receiving in advance (statically) select search pattern, so after receiving beginning receiving satellite signal and reduce power consumption at short notice.
(12) judge that in S116 satellite catches overtime when handling, so at the non-constant of reception environment, can not catch under the situation of gps satellite 5 at all, can prevent to continue useless reception and handle, can prevent cell voltage and reduce and cause system to stop because of the increase of power consumption.
And, in S120, judge the overtime of decode time, so under lower at incoming level, as can not the to obtain time information accurately situation, can prevent to continue the useless processing that receives the decode.Therefore, from this point, also can prevent cell voltage and reduce and cause system to stop because of the increase of power consumption.
(13) wrist-watch 1 of band GPS is worn on the user and goes up use, so under the situation that is in around the buildings such as building and is blocked easily and inferior owing to just being difficult to receive the situation of signal of gps satellite 5 in walking from the signal of gps satellite 5, compare with the clock and watch such as clock on being fixed on buildings, reception environment changes easily.When the wrist-watch 1 of the band GPS of present embodiment worsened at such reception environment, the user selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, reduces power consumption so can obtain the moment/all information at short notice.Therefore, the wrist-watch 1 of the band GPS of present embodiment is particularly suitable for the portable clock as wrist-watch and pocket-watch.
(14) and, in the present embodiment, when the user does not carry out the selection operation of search pattern, select a satellite acquisition pattern of initial setting.Therefore, when the user has carried out receiving operation, even forgotten the selection operation of search pattern, also can carry out to receive and handle with a satellite acquisition pattern of initial setting, for example do not compare, can not reduce operability with when not carrying out the selection operation of search pattern, just not carrying out the situation that receives processing.
(the 7th embodiment)
Below, the 7th embodiment of the present invention is described.
The 7th embodiment is shown in the process flow diagram of Figure 14, and the light quantity of measuring the light quantity of the wrist-watch 1 that shines band GPS detects to be handled, and selects a satellite acquisition pattern and a plurality of satellite acquisition pattern according to its detected value.
Therefore, the wrist-watch 1 of the band GPS of the 7th embodiment has actinometry portion (omitting diagram), is used to measure the light quantity of the wrist-watch 1 that shines band GPS.
At this, as actinometry portion, the optical sensors of direct mensuration light quantity can be set, but in the present embodiment, the solar cell that the irradiation that utilizes light is generated electricity is set, utilize the generated energy of solar cell to measure light quantity indirectly.That is, the wrist-watch 1 of band GPS has solar cell that battery 24 is charged and the generating test section that detects the generated energy of this solar cell, utilizes these solar cells and generating test section to constitute actinometry portion.
Below, about the treatment scheme of the 7th embodiment, mainly with reference to Figure 14 explanation part different with the 6th embodiment.
In the 7th embodiment, after beginning GPS received, actinometry portion measured the generated energy (S121) of solar cell.
And detection unit 151 judges that described generated energy is whether more than predefined predetermined value (S122).
That is, solar cell is configured under the situation of outdoor and irradiation sunshine by day at the wrist-watch 1 of band GPS, and generated energy improves, and when exposure cell's intraoral illumination, compares during with the irradiation sunshine, and generated energy reduces.And, be configured in when outdoor at night, to compare during with exposure cell's intraoral illumination, generated energy reduces.
Therefore, the threshold value (predetermined value) of the generated energy the when generated energy when can differentiate the irradiation sunshine and exposure cell's intraoral illumination by setting, if described generated energy more than predetermined value, then detection unit 151 wrist-watch 1 that can differentiate band GPS is configured in outdoor.As the concrete example of described threshold value, for example can set the generated energy that illumination (light quantity) is equivalent to 50001x (lux).That is, if outdoor during daytime, even rainy day and cloudy day, illumination is also more than 50001x.On the other hand, when indoor, because the illumination of use fluorescent light etc., so illumination is below 10001x.Therefore, can be about 50001x utilizing the threshold setting of light quantity (illumination) when judging indoor and outdoor, when utilizing generated energy to estimate light quantity indirectly, also can set the generated energy threshold value of the threshold value that is equivalent to described light quantity and judge indoor and outdoor.
When detection unit 151 was judged to be No in S122, search pattern selection portion 152 was selected a plurality of satellite acquisition patterns, carried out the reception of time information and handled (S113).
On the other hand, when detection unit 151 was judged to be " Yes " in S122, search pattern selection portion 152 was selected a satellite acquisition pattern, carried out the reception of time information and handled (S114).
Later treatment S 115～S122 is identical with described the 6th embodiment, so omit explanation.
(effect of the 7th embodiment)
According to the 7th embodiment, can bring into play and the identical action effect of described the 6th embodiment.
(15) in addition, because actinometry portion is set, be configured in outdoor if the light quantity that is measured to more than predetermined value, then can be judged the wrist-watch 1 of band GPS.Therefore, can judge automatically that reception environment is good, can select a satellite acquisition pattern to receive processing.
And,, can select a plurality of satellite acquisition patterns to receive processing if the light quantity that is measured to, can judge automatically then that the possibility that is in relatively poor state such as indoor reception environment such as grade is bigger less than predetermined value.
Therefore, according to present embodiment, can easily judge reception environment automatically according to actinometry.And, can select a satellite acquisition pattern and a plurality of satellite acquisition pattern according to the reception environment that determines, reduce power consumption so can shorten the average received time, even simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
(the 8th embodiment)
Below, with reference to Figure 15 the 8th embodiment of the present invention is described.
The wrist-watch 1 of the band GPS of the 8th embodiment is storing satellite orbit information (yearbook) in storage part 20A.Satellite-orbit information (yearbook) for example waits termly weekly and is received by satellite-signal.
And, shown in the process flow diagram of Figure 15, detection unit 151 is according to current time information and positional information and described satellite-orbit information, grasps the processing of the orbit information of current gps satellite 5 that can receiving satellite signal, detects the elevation angle (S131) of each gps satellite 5.
In addition, current time information can be with reference to the time information of the inside clock and watch of the wrist-watch 1 of band GPS.
And positional information can be stored in advance by receiving to obtain from the satellite-signal of a plurality of gps satellites 5 and the positional information of obtaining current place and be handled the information of obtaining, and with reference to this positional information.This positional information is obtained processing and is being gone to abroad when needing the change time zone usually, is undertaken by user's manual operation.
And detection unit 151 judges that the elevations angle are that the gps satellite 5 at the above high elevation angle of predetermined angular is whether more than predetermined quantity (S132).In S132, for example judge the elevation angle is whether the above gps satellite 5 of 60 degree is more than 3.
When detection unit 151 was judged to be No in S132, search pattern selection portion 152 was selected a plurality of satellite acquisition patterns, carried out the reception of time information and handled (S113).
On the other hand, when detection unit 151 was judged to be " Yes " in S132, search pattern selection portion 152 was selected a satellite acquisition pattern, carried out the reception of time information and handled (S114).
Later treatment S 115～S122 is identical with described the 6th embodiment, so omit explanation.
(effect of the 8th embodiment)
According to the 8th embodiment, can bring into play and the identical action effect of described the 6th embodiment.
(16) in addition, owing in storage part 20A, preserve the orbit information (yearbook) of each gps satellite 5, so can be easily receive judge in the current gps satellite that can receive 5 before handling, the elevation angle is whether gps satellite 5 more than the predetermined value more than predetermined quantity, as a result, can judge easily whether reception environment is good.
Therefore, can judge reception environment automatically according to satellite-orbit information, and according to this reception environment satellite acquisition pattern of selection or a plurality of satellite acquisition pattern, reduce power consumption so can shorten the average received time, even simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
(the 9th embodiment)
Below, with reference to Figure 16 the 9th embodiment of the present invention is described.
The wrist-watch 1 of the band GPS of the 9th embodiment has the incoming level test section of the incoming level that detects satellite-signal, stores in storage part 20A by the detected incoming level last time of this incoming level test section.
And shown in the process flow diagram of Figure 16, detection unit 151 is confirmed last time incoming level (S141) with reference to storage part 20A when receive handling.
And detection unit 151 judges that the incoming level last time confirmed is whether more than predetermined value (S142).For example, judge that last time incoming level is whether in predetermined value (for example-133dBm).
When detection unit 151 was judged to be No in S142, search pattern selection portion 152 was selected a plurality of satellite acquisition patterns, carried out the reception of time information and handled (S113).
On the other hand, when detection unit 151 was judged to be " Yes " in S142, search pattern selection portion 152 was selected a satellite acquisition pattern, carried out the reception of time information and handled (S114).
Later treatment S 115～S122 is identical with described the 6th embodiment, so omit explanation.In addition, receive control part 150 in S119, can obtain constantly/during all information, its incoming level is stored in (S143) among the storage part 20A.
(effect of the 9th embodiment)
According to the 9th embodiment, can bring into play and the identical action effect of described the 6th embodiment.
(17) in addition since in storage part 20A last time incoming level of storage, and according to this incoming level last time whether predetermined value with on differentiate reception environment, so can judge before receiving easily whether reception environment good.
Therefore, can judge reception environment automatically according to incoming level last time, and according to this reception environment satellite acquisition pattern of selection or a plurality of satellite acquisition pattern, reduce power consumption so can shorten the average received time, even simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
(variation)
In addition, the invention is not restricted to aforementioned each embodiment.
For example, the wrist-watch 1 of band GPS can have the translational speed test section of the translational speed of the wrist-watch 1 that detects band GPS.As the translational speed test section, for example can use acceleration transducer uniform velocity sensor.For example, when measuring acceleration and judge, if make housing in the peak acceleration of the time per unit of vertical direction during with two shaft vibrations at threshold value 0.98m/s 2(0.1G), then can judge it is in walking, if less than described threshold value, then can judge be static in.That is, be about 4.9～9.8m/s in the peak acceleration that described time set is worn on the housing when taking a walk on the wrist and jogging 2(0.5～1.0G).Therefore, can according to the peak acceleration that determines whether more than described threshold value, differentiate time set and be in mobile status or stationary state.
By this translational speed test section is set, arrive predetermined value (threshold value) slowly when following in detected speed, to compare during with detection speed greater than predetermined value, the possibility that reception environment is good is bigger.That is, when the satellite-signal that receives from gps satellite 5, when the relationship change of the position of gps satellite 5 and the wrist-watch 1 of band GPS, will be difficult to receiving satellite signal.Therefore, if the translational speed of wrist-watch 1 of band GPS accelerates, then reception environment worsens, so in translational speed during greater than predetermined value, a plurality of satellite acquisition patterns that selective reception sensitivity is higher, when translational speed when predetermined value is following, select a satellite acquisition pattern, can shorten the average received time thus and reduce power consumption, even simultaneously under the situation that reception environment worsens, also can improve the probability that can obtain the moment/all information, the restriction of reception site reduces, and can improve convenience.
And, the wrist-watch 1 of band GPS is stored the time of reception that receives when handling in storage part 20A, detection unit 151 is confirmed last time time of reception with reference to storage part 20A when receive handling, if this time of reception is at the fixed time below (threshold value), then select a satellite acquisition pattern, if longer, then select a plurality of satellite acquisition patterns than the schedule time.
More in short-term, can judge that reception environment is good at last time time of reception, then the possibility that this reception environment is good is bigger.That is, when carrying out automatic reception and handle, automatic reception next time receives in the identical time usually, so that reception environment is the situation of identical state is in the majority.And, manually receiving when handling, the user receives the situation of operation under identical reception environment in the majority.
Therefore, when no matter still manually receiving when automatic reception, the situation that reception environment last time is identical with this reception environment is in the majority.Therefore, more in short-term, the possibility that reception environment is good next time when receiving is bigger, so can select a satellite acquisition pattern at last time time of reception.On the other hand, when time of reception last time was longer, the relatively poor possibility of reception environment was bigger next time when receiving, so can select a plurality of satellite acquisition patterns.
In addition,, for example when receiving only the Z enumeration data, 1 minute can be set at, when also receiving calendar information such as all sequence numbers, 3 minutes can be set at etc. about judging the threshold value of time of reception.As previously mentioned, the Z enumeration data can receive at interval with 6 seconds, so when time of reception reached more than 1 minute, it was relatively poor to be judged to be reception environment.In addition, all sequence numbers can receive at interval with 30 seconds, so exist according to receiving beginning regularly, though the good situation that still need spend more than 1 minute that receives of reception environment.Therefore, preferably must be than Z enumeration data duration with described threshold setting.For example, can be set at about 3 minutes.
In addition, as the decision method of reception environment, can be in conjunction with each decision method of putting down in writing in a plurality of described each embodiments and the variation.For example, can be in conjunction with the judgement that detects based on light quantity with based on the judgement of translational speed, the wrist-watch 1 that though to detect light quantity be predetermined value, promptly can judge band GPS be in outdoor translational speed is more than the predetermined value, promptly with the wrist-watch 1 of GPS when mobile, it is not so well to be judged to be reception environment, and is set at a plurality of satellite acquisition patterns of selecting.
In addition, in described the 6th～the 9th embodiment, the first moment after power supply has just been connected receives with the result of determination of detection unit 151 irrelevant, can constitute and select a plurality of satellite acquisition patterns all the time.
After power supply was just connected, the time of clock and watch, possibility devious was bigger, so need reliably the information time of reception.Therefore, the first moment after power supply is just connected if select a plurality of satellite acquisition patterns, then can be obtained the possibility increase of time information, the moment that can proofread and correct the wrist-watch 1 of band GPS exactly when receiving reliably.
And the concrete time of (searching for overtime judgement time, overtime judgement time of a plurality of search, overtime judgement time of decoding) of the overtime judgement time in described each embodiment is not limited to aforementioned embodiments, can suitably set when implementing.
In addition, the threshold value in described each embodiment and the variation is not limited to the value of the object lesson of example, can be set at the value that can differentiate various states when implementing.
In addition, time set is not limited to be assemblied on the wrist-watch 1 of band GPS.For example, also can be assemblied on mobile phone etc.
And, above-mentioned each embodiment has illustrated the situation of gps satellite, but, the invention is not restricted to gps satellite, also can be the positional information satellite that transmissions such as stationary satellites such as other all earth navigational satellite systems (GNSS) such as Galileo, GLONASS, SBAS and accurate zenith satellite comprise the satellite-signal of time information.

Claims (22)

1. time set has: acceptance division, and its catching position information satellite, and receive satellite-signal from this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that,
Described reception control part has:
Satellite is caught control part, and it controls the seizure processing that described acceptance division makes it executing location information satellite;
The signal condition test section, the signal condition of the positional information satellite that its detection captures;
Decoding control section, it is controlled described acceptance division and makes it to carry out from the decoding processing of the satellite-signal of the positional information satellite transmission that captures; And
Receiving channel setting portion, it is set at a satellite mode or multichannel pattern according to by the detected signal condition of described signal condition test section with described acceptance division,
When described acceptance division is set to a satellite mode, the quantity of the positional information satellite that can catch simultaneously and decode is set to one, when described acceptance division was set to the multichannel pattern, the quantity of the positional information satellite that can catch simultaneously and decode was set to a plurality of.
2. time set according to claim 1, it is characterized in that, described receiving channel setting portion is made as described acceptance division a satellite mode when beginning to receive, catch a positional information satellite, utilize described signal condition test section to detect the signal condition of the positional information satellite that captures with a satellite mode, according to detected described signal condition, the state that is chosen in a described satellite mode continues situation about handling and the situation that changes the multichannel pattern from a satellite mode over to down.
3. time set according to claim 1 and 2, it is characterized in that, described receiving channel setting portion is when described acceptance division is set to a satellite mode, if the signal intensity of the positional information satellite that captures then changes the multichannel pattern over to less than setting value.
4. time set according to claim 3 is characterized in that, described receiving channel setting portion sets the receive channel quantity under the described multichannel pattern according to the signal intensity of the positional information satellite that captures.
5. according to any described time set in the claim 1～4, it is characterized in that, described receiving channel setting portion is when described acceptance division is set to a satellite mode, in the signal intensity of the positional information satellite that captures more than the setting value but under the situation of the time information of in the predefined decoding overtime judgement time, can not decoding, change the multichannel pattern over to from satellite-signal.
6. time set according to claim 5 is characterized in that, described receiving channel setting portion sets the overtime judgement time of described decoding according to the signal intensity of the described positional information satellite that captures.
7. according to any described time set in the claim 1～4, it is characterized in that, described receiving channel setting portion is when described acceptance division is set to a satellite mode, amplitude of fluctuation in the signal intensity of the positional information satellite that the captures signal intensity more than setting value but when decoding described satellite-signal surpasses under the situation of setting amplitude, changes the multichannel pattern over to.
8. according to any described time set in the claim 1～7, it is characterized in that,
When described acceptance division is set to the multichannel pattern,
Described satellite seizure control part is a plurality of scopes with the seizure frequency setting of positional information satellite, carries out the seizure of positional information satellite in each frequency range.
9. according to any described time set in the claim 1～8, it is characterized in that,
When described acceptance division is set to the multichannel pattern,
Described satellite catch control part under the situation that can capture the positional information satellite of setting quantity or the signal intensity of the positional information satellite that captures under the situation more than the setting value, finish satellite and catch and handle,
Described decoding control section is caught after processing finishes at satellite, the satellite-signal of the positional information satellite that decoding captures.
10. according to any described time set in the claim 1～9, it is characterized in that,
When described acceptance division is set to the multichannel pattern,
Described satellite is caught control part and is handled according to the seizure of each receive channel executing location information satellite,
Described decoding control section is carried out the decoding processing of satellite-signal from the positional information satellite that can capture, and judges whether can decode and obtain time information,
Described satellite catches that control part can be decoded and when obtaining time information in any one receive channel, finish satellite and catch and handle.
11. any described time set according in the claim 1～10 is characterized in that,
Described time set has:
Generate the inside time information generating unit of inner time information; And
Proofread and correct the time information correction unit of described inner time information,
Described time information correction unit utilizes described time information generating unit according to the time information that the satellite-signal that is received by described acceptance division generates, and proofreaies and correct described inner time information,
Described moment display part shows described inner time information.
12. a time set has: acceptance division, its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that,
Described reception control part has:
Detection unit, it judged the reception environment of time set before receiving processing; And
The search pattern selection portion, when it receives processing at described acceptance division, result of determination according to described detection unit is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, wherein, a described satellite acquisition pattern is used to catch a positional information satellite, and obtain time information according to satellite-signal from this positional information satellite transmission, described a plurality of satellite acquisition pattern is used to catch a plurality of positional information satellites, and obtains time information according to the satellite-signal of a positional information satellite transmission from a plurality of positional information satellites that capture.
13. time set according to claim 12 is characterized in that,
Described time set has the actinometry portion that measures the light quantity that shines time set,
Whether described detection unit judge by described actinometry portion and be measured to light quantity more than the predetermined value,
When described search pattern selection portion is judged the light quantity that has been measured to more than the predetermined value at described detection unit, select a described satellite acquisition pattern, when judging the light quantity that has been measured to less than predetermined value, select described a plurality of satellite acquisition pattern.
14. time set according to claim 12 is characterized in that,
Described time set has the translational speed determination part of the translational speed of measuring time set,
Whether described detection unit judge by described translational speed determination part and be measured to translational speed below the predetermined value,
When described search pattern selection portion is judged the translational speed that has been measured to below the predetermined value at described detection unit, select a described satellite acquisition pattern, when judging the translational speed that has been measured to greater than predetermined value, select described a plurality of satellite acquisition pattern.
15. time set according to claim 12 is characterized in that,
Described time set has the storage part of the orbit information of the described positional information satellite of storage,
Described detection unit is according to the orbit information that is stored in the described storage part, the positional information satellite that judge in the time point that receives processing can location of capture information satellite, is positioned at the high elevation angle more than the predetermined angular whether more than predetermined quantity,
Described search pattern selection portion when predetermined quantity is above, is selected a described satellite acquisition pattern at the described positional information satellite that is positioned at the high elevation angle of described detection unit judgement, when judging less than predetermined quantity, selects described a plurality of satellite acquisition pattern.
16. time set according to claim 12 is characterized in that,
Described time set has:
The incoming level test section, it detects the incoming level of the satellite-signal that receives from the positional information satellite; And
Storage part, it is stored by the detected incoming level of described incoming level test section,
Described detection unit is judged incoming level when being stored in last time receiving in the described storage part whether more than predetermined value,
The incoming level of described search pattern selection portion when described detection unit judgement last time received selected a described satellite acquisition pattern when described predetermined value is above, when judging less than predetermined value, select described a plurality of satellite acquisition pattern.
17. time set according to claim 12 is characterized in that,
Described time set has:
The time of reception determination part, it measures the time of reception that obtains time information from positional information satellite receiving satellite signal; And
Storage part, the time of reception that its storage is measured to by described time of reception determination part,
Described detection unit judge when being stored in last time receiving in the described storage part time of reception whether at the fixed time below,
Described search pattern selection portion judges that at described detection unit time of reception when last time receiving when following, selects a described satellite acquisition pattern in the described schedule time, selects described a plurality of satellite acquisition pattern when longer than the schedule time judging.
18. time set according to claim 12 is characterized in that,
Described time set has the operable external operating unit of user,
Described detection unit judges whether utilize described external operating unit to carry out the selection operation of any one pattern in a satellite acquisition pattern or a plurality of satellite acquisition pattern,
When described search pattern selection portion has been carried out the selection operation of a satellite acquisition pattern in described detection unit judgement, select a described satellite acquisition pattern, when the selection operation of a plurality of satellite acquisition patterns has been carried out in judgement, select described a plurality of satellite acquisition pattern.
19. time set according to claim 18, it is characterized in that, when described search pattern selection portion is not carried out the selection operation of any one pattern in a satellite acquisition pattern or a plurality of satellite acquisition pattern in described detection unit judgement, select a described satellite acquisition pattern.
20. according to any described time set in the claim 12～19, it is characterized in that, described search pattern selection portion is at first carried out the moment when receive handling after the time set energized, irrelevant with the result of determination of described detection unit, selects a plurality of satellite acquisition patterns.
21. the satellite signal reception method of a time set, this time set has: acceptance division, and its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described satellite signal reception method comprises:
Catch the satellite of described positional information satellite and catch step;
Signal condition detects step, detects the signal condition of catching the positional information satellite that captures in the step at described satellite;
Decoding step, decoding is from catching the satellite-signal of the positional information satellite transmission that captures the step at described satellite; And
The receiving channel setting step, according to detecting detected signal condition in the step in described signal condition, the quantity that described acceptance division is set at the positional information satellite that can catch simultaneously and decode is that the quantity of a satellite mode of one or the positional information satellite that can catch simultaneously and decode is any one pattern in a plurality of multichannel pattern.
22. the satellite signal reception method of a time set, this time set has: acceptance division, and its catching position information satellite, and reception is from the satellite-signal of this described positional information satellite transmission that captures; The time information generating unit, it generates time information according to the satellite-signal that described acceptance division receives; The moment display part that shows time information; And the reception control part of controlling described acceptance division, it is characterized in that described satellite signal reception method comprises:
Determination step, the reception environment of judgement time set before receiving processing; And
Search pattern is selected step, when described acceptance division receives processing, result of determination according to described detection unit is selected a satellite acquisition pattern and a plurality of satellite acquisition pattern, wherein, a described satellite acquisition pattern is used to catch a positional information satellite, and obtain time information according to satellite-signal from this positional information satellite transmission, described a plurality of satellite acquisition pattern is used to catch a plurality of positional information satellites, and obtains time information according to the satellite-signal of a positional information satellite transmission from a plurality of positional information satellites that capture.
CN2008101856593A 2007-12-19 2008-12-19 Timekeeping device and satellite signal reception method for a timekeeping device Expired - Fee Related CN101464656B (en)

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