CN107957677A - A kind of time device time calibrating method of mobile unit - Google Patents
A kind of time device time calibrating method of mobile unit Download PDFInfo
- Publication number
- CN107957677A CN107957677A CN201711279018.XA CN201711279018A CN107957677A CN 107957677 A CN107957677 A CN 107957677A CN 201711279018 A CN201711279018 A CN 201711279018A CN 107957677 A CN107957677 A CN 107957677A
- Authority
- CN
- China
- Prior art keywords
- time
- rtc
- exterior
- internal
- gps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R40/00—Correcting the clock frequency
- G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal
Abstract
The invention discloses a kind of time device time calibrating method of mobile unit, the present invention using internal RTC, outside RTC timing at the same time, when server, GPS schools mode combination uninterrupted clock support can be provided for mobile unit；All applications of the present invention obtain current time by internal RTC time, greatly reduce CPU and the time loss of exterior RTC clock communication, greatly improve work efficiency.
Description
Technical field
The present invention relates to the time device time calibrating method of time calibration technical field, specially a kind of mobile unit.
Background technology
Embedded system time calibration mode mainly has now：The calibration sides such as server time calibration, gps time calibration
Formula；When equipment can not be connected with server, such as：GPRS/3G/4G signals are weak, server exception etc., server time calibration side
Formula will be unable to carry out；Ephemeris time can not be obtained when gps signal is weak, gps time calibrating mode also will be unable to carry out；Embedded system
Timing is mainly carried out using the mode such as exterior RTC chip or internal RTC block, but exterior RTC chip is generally led to using I2C
News, its communication speed is slower, for needing the scene drawback for frequently reading current time larger；The internal easy factor of RTC clock
Situations such as group is crossed the border, code is abnormal is illegally modified, and stability is poor.
The content of the invention
It is an object of the invention to provide a kind of time device time calibrating method of mobile unit, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides following technical solution：A kind of time device time calibration of mobile unit
Method, using internal RTC, outside RTC timing at the same time, when server, GPS schools a kind of time for mobile unit that mode combines set
Standby time calibrating method；Calibration method is respectively：
A, clock alignment is powered on：It is interior using the timing mode of internal RTC, outside RTC timing at the same time, exterior RTC charged pools
Portion RTC works under exterior electric power thus supplied；Internal RTC clock is read exterior in the case where upper electric network, GPS are work
RTC clock count value is calibrated for internal RTC；
B, server time is calibrated：Equipment actively can obtain real-time time after being server connection to server, obtain
At the same time can be carried out to exterior RTC and inside RTC time calibration after taking the time；
C, gps time is calibrated：After GPS positioning, equipment can timing detection gps time and outside RTC and inside RTC when
Between deviation, when time deviation is more than a certain range, current gps time can be used to exterior RTC and inside RTC progress time school
It is accurate；
D, current RTC time obtains：Based on mobile unit using current time as baseline, to time requirement of real-time compared with Gao Te
Point, all references obtain current time by internal RTC time, reduce CPU and exterior RTC clock communication time, improve
CPU work efficiencies.
Preferably, time calibration protection is further included：To outside or inside RTC carry out time calibration when, all can to it is external when
Between be detected, whether detection time legal, if illegal do not calibrate RTC.
Preferably, time calibration process：Because internal RTC clock is without battery, inside RTC time is invalid after system starts, therefore
First read the exterior internal RTC time of RTC time calibration；After system Connection Service device, current time is obtained from server, is used for
The internal RTC of calibration and exterior RTC time；After band GPS positioning, system detect in real time exterior current RTC time and gps time when
Between it is poor, if the time difference be more than 10s, when RTC carries out pressure school inside and out system pair.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention uses internal RTC, outside RTC timing at the same time,
Mode combination can provide uninterrupted clock for mobile unit and support when server, GPS schools；All applications of the present invention are by interior
Portion's RTC time obtains current time, greatly reduces CPU and the time loss of exterior RTC clock communication, substantially increases work
Efficiency.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the present invention provides a kind of technical solution：The present invention provides following technical solution：A kind of mobile unit
Time device time calibrating method, using internal RTC, outside RTC timing at the same time, mode combines when server, GPS schools one
The time device time calibrating method of kind mobile unit；Calibration method is respectively：
A, clock alignment is powered on：It is interior using the timing mode of internal RTC, outside RTC timing at the same time, exterior RTC charged pools
Portion RTC works under exterior electric power thus supplied；Internal RTC clock is read exterior in the case where upper electric network, GPS are work
RTC clock count value is calibrated for internal RTC；
B, server time is calibrated：Equipment actively can obtain real-time time after being server connection to server, obtain
At the same time can be carried out to exterior RTC and inside RTC time calibration after taking the time；
C, gps time is calibrated：After GPS positioning, equipment can timing detection gps time and outside RTC and inside RTC when
Between deviation, when time deviation is more than a certain range, current gps time can be used to exterior RTC and inside RTC progress time school
It is accurate；
D, current RTC time obtains：Based on mobile unit using current time as baseline, to time requirement of real-time compared with Gao Te
Point, all references obtain current time by internal RTC time, reduce CPU and exterior RTC clock communication time, improve
CPU work efficiencies.
In the present invention, time calibration protection is further included：, all can be to external when carrying out time calibration to outside or inside RTC
Time is detected, and whether detection time is legal, if illegal do not calibrate RTC.
In the present invention, time calibration process：Because internal RTC clock is without battery, inside RTC time is invalid after system starts,
Therefore first read the exterior internal RTC time of RTC time calibration；After system Connection Service device, current time is obtained from server, is used
In the internal RTC of calibration and exterior RTC time；After band GPS positioning, system detects exterior current RTC time and gps time in real time
Time difference, if the time difference be more than 10s, when RTC carries out pressure school inside and out system pair.
In the present invention, time calibration subfunction is, time calibration subfunction there are two kinds return the result TRUE- it is normal,
FALSE- is abnormal；Whether time calibration subfunction first detects input time legal, if illegal directly return to FALSE；If
Time detecting is normal, configures internal RTC clock and reads internal RTC clock, if the time difference is more than 2 seconds, directly returns
FALSE；Exterior RTC time is similarly configured, if inside RTC and exterior RTC time setting are normal, returns to TRUE.
In the present invention, time legitimacy detection principle is：Current time have to be larger than current firmware compilation time；When current
Between must be in current firmware compilation time 10 years；Current time year, month, day cannot be zero；2 months leap years should be less than being equal to day
29 days；The day in 2 months non-leap years should be less than or equal to 28 days；It should be less than the day in the solar month being equal to 30 days；It should be less than the moon in solar month of 30 days being equal to 31
My god；When should be less than 24 it is small when；Dividing be less than 60 points；Second should be less than 60 seconds.
The present invention using internal RTC, outside RTC timing at the same time, when server, GPS schools mode combination can be set to be vehicle-mounted
It is standby that uninterrupted clock support is provided；All applications of the present invention obtain current time by internal RTC time, greatly reduce
CPU and the time loss of exterior RTC clock communication, greatly improve work efficiency.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
- A kind of 1. time device time calibrating method of mobile unit, it is characterised in that：Counted at the same time using internal RTC, outside RTC When, the time device time calibrating method for a kind of mobile unit that mode combines when server, GPS schools；Calibration method is respectively：A, clock alignment is powered on：It is internal using the timing mode of internal RTC, outside RTC timing at the same time, exterior RTC charged pools RTC works under exterior electric power thus supplied；Internal RTC clock reads exterior RTC in the case where upper electric network, GPS are work Clock count value is calibrated for internal RTC；B, server time is calibrated：Equipment actively can obtain real-time time after being server connection to server, when obtaining Between after can at the same time to exterior RTC and inside RTC progress time calibration；C, gps time is calibrated：After GPS positioning, the time that equipment can periodically detect gps time and outside RTC and inside RTC is inclined Difference, when time deviation is more than a certain range, can use current gps time to exterior RTC and inside RTC progress time calibrations；D, current RTC time obtains：Based on mobile unit using current time as baseline, to the higher feature of time requirement of real-time, All references obtains current time by internal RTC time, reduces CPU and exterior RTC clock communication time, improves CPU work efficiencies.
- A kind of 2. time device time calibrating method of mobile unit according to claim 1, it is characterised in that：Further include Time calibration protects：When carrying out time calibration to outside or inside RTC, future times can be all detected, detection time is It is no legal, if illegal do not calibrate RTC.
- A kind of 3. time device time calibrating method of mobile unit according to claim 1, it is characterised in that：Time school Quasi- process：Because internal RTC clock is without battery, inside RTC time is invalid after system starts, therefore first reads exterior RTC time calibration Internal RTC time；After system Connection Service device, current time is obtained from server, for calibrating internal RTC and outside RTC Time；After band GPS positioning, system detects the time difference of exterior current RTC time and gps time in real time, if the time difference is more than 10s, when RTC carries out pressure school inside and out system pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279018.XA CN107957677B (en) | 2017-12-06 | 2017-12-06 | Time equipment time calibration method of vehicle-mounted equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279018.XA CN107957677B (en) | 2017-12-06 | 2017-12-06 | Time equipment time calibration method of vehicle-mounted equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107957677A true CN107957677A (en) | 2018-04-24 |
| CN107957677B CN107957677B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711279018.XA Active CN107957677B (en) | 2017-12-06 | 2017-12-06 | Time equipment time calibration method of vehicle-mounted equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726190A (en) * | 2020-06-18 | 2020-09-29 | 四川艾贝斯科技发展有限公司 | System time calibration method for street lamp control system |
| CN112468172A (en) * | 2020-11-17 | 2021-03-09 | 常州仁千电气科技股份有限公司 | Vehicle-mounted network terminal TBOX |
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| JP2011226866A (en) * | 2010-04-16 | 2011-11-10 | Seiko Instruments Inc | Gps timepiece and its method |
| CN103309228A (en) * | 2013-06-21 | 2013-09-18 | 厦门雅迅网络股份有限公司 | Time correcting method of car-mounted terminal system |
| CN103399484A (en) * | 2013-07-23 | 2013-11-20 | 深圳市元征科技股份有限公司 | Local clock calibrating method and vehicle-mounted equipment |
| CN104808479A (en) * | 2014-01-23 | 2015-07-29 | 大陆汽车车身电子系统（芜湖）有限公司 | Device and method for updating vehicle-mounted clock |
| CN104866065A (en) * | 2014-02-21 | 2015-08-26 | 三星电子株式会社 | Low Power Driving Method And Electronic Device Performing Thereof |
| CN107329398A (en) * | 2017-06-06 | 2017-11-07 | 湖南中联重科智能技术有限公司 | Car-mounted terminal time keeping system and method |
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2017
- 2017-12-06 CN CN201711279018.XA patent/CN107957677B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011226866A (en) * | 2010-04-16 | 2011-11-10 | Seiko Instruments Inc | Gps timepiece and its method |
| CN103309228A (en) * | 2013-06-21 | 2013-09-18 | 厦门雅迅网络股份有限公司 | Time correcting method of car-mounted terminal system |
| CN103399484A (en) * | 2013-07-23 | 2013-11-20 | 深圳市元征科技股份有限公司 | Local clock calibrating method and vehicle-mounted equipment |
| CN104808479A (en) * | 2014-01-23 | 2015-07-29 | 大陆汽车车身电子系统（芜湖）有限公司 | Device and method for updating vehicle-mounted clock |
| CN104866065A (en) * | 2014-02-21 | 2015-08-26 | 三星电子株式会社 | Low Power Driving Method And Electronic Device Performing Thereof |
| CN107329398A (en) * | 2017-06-06 | 2017-11-07 | 湖南中联重科智能技术有限公司 | Car-mounted terminal time keeping system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726190A (en) * | 2020-06-18 | 2020-09-29 | 四川艾贝斯科技发展有限公司 | System time calibration method for street lamp control system |
| CN111726190B (en) * | 2020-06-18 | 2022-10-04 | 四川艾贝斯科技发展有限公司 | System time calibration method for street lamp control system |
| CN112468172A (en) * | 2020-11-17 | 2021-03-09 | 常州仁千电气科技股份有限公司 | Vehicle-mounted network terminal TBOX |
Also Published As
| Publication number | Publication date |
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| CN107957677B (en) | 2020-04-28 |
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