CN103869692A - Pointer type clock timing method - Google Patents
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- CN103869692A CN103869692A CN201210546257.8A CN201210546257A CN103869692A CN 103869692 A CN103869692 A CN 103869692A CN 201210546257 A CN201210546257 A CN 201210546257A CN 103869692 A CN103869692 A CN 103869692A
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Abstract
The invention discloses a pointer type clock timing method. The timing method comprises the following steps of S01, enabling a brownout detection module (150) to detect the brownout of an external power source; S02, enabling a storage module (160) to store the local time during brownout as the brownout time; S03, when the external power source is energized, enabling an MCU (micro controller unit) (110) to read the brownout time stored in the storage module (160), comparing the local time during energizing and the brownout time, and calculating the recovering time. The pointer type clock timing method has the advantages that after the system is deenergized, the pointer indicating time is recorded in the internal storage, for the time recovering during energizing; when the system is re-energized, according to the memorized deenergizing time, the shortest time recovering path is calculated, and the intelligent time recovering is carried out; in addition to the time recovering during brownout, the system also has the GPS (global positioning system) timing and time recovering functions and the position feedback synchronous time recovering function, so the synchronism of the pointer indicating time and the standard time is guaranteed.
Description
Technical field
The present invention relates to timing control technology field, more particularly, relate to a kind of pointer clock calibration method.
Background technology
Be accompanied by urban construction development with rapid changepl. never-ending changes and improvements, especially new modern transport hub is as the continuous completion of station, harbour, airport, subway, clock and watch are not only interspersed for public place provides ornamental, and the more important thing is that it provides displaying time and time service to mobile people, constantly remind working hard that people will value one's time, quicken one's step and race against time.
In existing technology, disclosed a kind of movement method for designing that realizes pointer location, this method is provided with storage battery power supply device in Power supply project, still can ensure 3 hours wait connection primary powers of clock operation after 220V primary power disconnects; Still can not obtaining primary power when power supply, time 12 positions of minute hand automatic homing, reached to people and sent the out of order warning of clock.
Rest on 12 positions and come positioning pointer position but rely on pointer when the pointer of the method chases after completely, do not rest on reliably 12 positions once there is the pointer that batteries to store energy declines or other reasons causes, system does not just possess self-calibrating auto retrieving time function.
Summary of the invention
The technical matters that the present invention solves is, only rely on accumulator pointer to be rested on to 12 positions and comes the reliability defect of positioning pointer position for prior art above-mentioned, a kind of pointer clock calibration method is provided, by the pointer instruction time after the power-off of internal storage register system, when system powers on again, needn't rely on the pointer clock calibration method of the pointer location of 12 positions, simultaneously, while chasing after during by GPS school and when position feedback synchronously chases after, when three recalibrations chase after, realize the synchronous of pointer instruction time and standard time, accuracy and the reliability of persond eixis are ensured to provide for public place.
The technical solution adopted for the present invention to solve the technical problems is: a kind of pointer clock calibration method, internal clocking source module, GPS receiver module, position detecting module, detection of power loss module, memory module and motor drive module that described pointer clock comprises MCU and is connected with MCU, in described internal clocking source module, be provided with rechargeable battery, in the time of external power source power down, when described rechargeable battery maintains normally walking of internal clocking, described calibration method comprises the following steps:
S01: detection of power loss module detects external power source power down;
S02: local time when memory module is preserved power down is the power down time;
S03: in the time that external power source powers on, the power down time of MCU reading and saving in memory module, time when local time when contrast powers on and power down Time Calculation go out to chase after;
S04: flow process when time unlatching motor chases after when what motor drive module basis calculated chases after.
In pointer clock calibration method of the present invention, after powering on and completing while chasing after, also comprise the calibration to internal time, comprise the following steps:
S05:GPS receiver module receives UTC time signal and position signalling;
S06:MCU converts local standard time T1 to according to obtained UTC time signal and position signalling, the time T 0 of MCU buffer memory internal clocking source module, and T1 is write to internal clocking source module as internal time;
Whether life period is poor for S07:MCU contrast T1 and T0, and flow process when if so, opening motor and chasing after, if not, finishes.
In pointer clock calibration method of the present invention, described S05 step further comprises: first judge whether to meet the condition that gps data receives: time and carrying out while not having other to chase after while arriving timing GPS school.In the time that above-mentioned condition meets, open gps data and receive flow process, first open serial ports and interrupt, wait for that serial ports interrupts obtaining gps data, gps data is decoded and extract UTC time and positional information, the flow process that described gps data receives is:
S08: the time while judging whether to arrive school, and whether be 1, if so, enter S09 if completing mark when school, if not, enter step S10;
S09: complete mark clear 0, it is clear 0 that GPS finishes receiving mark when in the school, gps data receiving register is clear 0, allows serial ports receive interruption;
S10: whether be 0, if so, enter S11 if completing mark while judging school, if not, data receiver finishes;
S11: whether receive UTC time and positional information, if so, GPS finishes receiving mark and puts 1, enters S12, and if not, data receiver finishes;
S12:UTC time and position data decoding;
S13: close serial ports receive interruption, complete and be designated 1 while putting school, gps data receives and finishes.
In pointer clock calibration method of the present invention, position detecting module is for detection of the position of time-division pointer and second pointer, when MCU detects the position feed back signal of time-division pointer and second pointer, if and motor while chasing after flow process and gps data receive flow process when underway, will executing location feed back flow process while synchronously chasing after, when described position feedback synchronously chases after, flow process comprises the following steps:
The position feed back signal that S 14:MCU receiving position detection module detects;
S15:MCU determines pointer current time according to position feed back signal;
S16:MCU contrast pointer current time and internal clocking source module time, whether life period was poor, and flow process when if so, opening motor and chasing after, if not, finishes.
In pointer clock calibration method of the present invention, when described motor chases after, flow process comprises the following steps:
S17: judge while chasing after, whether flag is 1, while chasing after, status indicator is 0, if so, enters S18, if not, enters S19;
S18: putting status indicator while chasing after is 1, path setting motor rotation direction and rotating speed during according to the shortest chasing after;
S19: judge while chasing after, whether status indicator position is 1, if so, enters S20, if not, finishes while chasing after;
S20: whether detect current time==time while chasing after, if so, enter S21, if not, finish while chasing after;
S21: while chasing after, flag is clear 0, while chasing after, status indicator is clear 0, sets motor status state when normally walking.
Implement pointer clock calibration method of the present invention, after system cut-off, record pointer instruction time now by internal storage, while chasing after for incoming call; When system powers on again, needn't rely on the pointer positioning signal of 12 positions, can memory based power-off time, path while calculating the shortest chasing after, when expansion intelligence chases after, while chasing after, the time is short, adaptive ability is strong, while chasing after during simultaneously by GPS school, eliminated cumulative errors, realized the synchronous of internal time and pointer instruction time by position feedback while synchronously chasing after, when described three recalibrations chase after, design has improved reliability greatly.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the theory diagram of automatic correcting time system of the present invention;
Fig. 2 is the schematic diagram of pointer clock calibration method of the present invention;
Fig. 3 is pointer clock calibration method process flow diagram of the present invention;
Processing flow chart when Fig. 4 is power down of the present invention/power on;
Process flow diagram when Fig. 5 chases after while being GPS of the present invention school;
Fig. 6 is that pointer position of the present invention feeds back process flow diagram while synchronously chasing after;
Fig. 7 is motor of the present invention process flow diagram while chasing after.
Embodiment
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Please refer to Fig. 1, a kind of pointer clock calibration method, internal clocking source module 120, GPS receiver module 130, position detecting module 140, detection of power loss module 150, memory module 160 and motor drive module 170 that described pointer clock comprises MCU110 and is connected with MCU110.
Refer to Fig. 2 and Fig. 3, in the specific embodiment of the present invention, pointer clock calibration method, specifically comprises the following steps:
S01: detection of power loss module 150 detects external power source power down;
S02: local time when memory module 160 is preserved power down is the power down time;
S03: in the time that external power source powers on, the power down time of MCU110 reading and saving in memory module 160, time when local time when contrast powers on and power down Time Calculation go out to chase after;
S04: flow process when time unlatching motor chases after when what motor drive module 170 bases calculated chases after.
In the specific embodiment of the present invention, internal clocking source module 120 passes through I
2c bus and MCU110 are interconnected, and internal clocking source module 120 is mainly made up of SD2201 clock chip, and SD2201 chip comprises crystal oscillator and rechargeable battery.Specifically in the present embodiment, crystal oscillator precision can ensure that clock accuracy is in ± 5ppm, and rechargeable battery can ensure to exceed one-year age when internal clocking is walked in the situation that being full of, and be 5～8 years the service time of battery.Even external power source power down like this, the local zone time of internal clocking source module 120 inside still relies on rechargeable battery to maintain normal timing, and the pointer when again powering on provides reliable time reference while chasing after.
Detection of power loss module 150, for monitoring whether external power source can be used, in the time of external power source power down, detection of power loss module 150 can send external power source power down notice to MCU110 immediately.
S31: detect whether power down of external power source, if so, enter S32, if not, enter S33;
S32: power down home position 99, preserve power down mark to EEPROM, preserve now temporal information and arrive EEPROM;
S33: detect external power source and whether power on, and power down mark==0, if so, enter S34, if not, processing finishes;
S34: read the power down zone bit in EEPROM;
S35: judge whether power down zone bit==99, the S36 that if so, enters, if not, processing finishes;
S36: power down home position 1, the power down moment time of reading and saving in EEPROM, path and time while chasing after when contrast power down time and local zone time calculate the shortest chasing after, home position 1 while chasing after;
S37: flow process when entering motor and chasing after.
After having powered on, also comprise the calibration to internal time, comprise the following steps:
S05:GPS receiver module 130 receives UTC time signal and position signalling;
S06:MCU110 converts local standard time T1 to according to obtained UTC time signal and position signalling, the time T 0 of MCU110 buffer memory internal clocking source module 120, and T1 is write to internal clocking source module 120 as internal time;
Whether life period is poor for S07:MCU110 contrast T1 and T0, and flow process when if so, opening motor and chasing after, if not, finishes.
Described S05 step further comprises: first judge whether to meet the condition that gps data receives: time and carrying out while not having other to chase after while arriving timing GPS school.In the time that above-mentioned condition meets, open gps data and receive flow process, first open serial ports and interrupt, wait for that serial ports interrupts obtaining gps data, gps data is decoded and extract UTC time and positional information, the flow process that described gps data receives is:
S08: the time while judging whether to arrive school, and whether be 1, if so, enter S09 if completing mark when school, if not, enter step S10;
S09: complete mark clear 0, it is clear 0 that GPS finishes receiving mark when in the school, gps data receiving register is clear 0, allows serial ports receive interruption;
S10: whether be 0, if so, enter S11 if completing mark while judging school, if not, data receiver finishes;
S11: whether receive UTC time and positional information, if so, GPS finishes receiving mark and puts 1, enters S12, and if not, data receiver finishes;
S12:UTC time and position data decoding;
S 13: close serial ports receive interruption, complete and be designated 1 while putting school, gps data receives and finishes.
Specifically in the present embodiment, GPS receiver module 130 comprises antenna and gps receiver 132, gps receiver 132 receives UTC time signal and position signalling, GPS receiver module 130 is communicated by letter with MCU110 by serial ports, MCU110 judges the legitimacy of the data that receive, if legal, data is write to described internal clocking source module 120.Specifically in the present embodiment, gps receiver 132 can receive UTC time signal and position signalling, communicates by letter with MCU110 by serial ports.Time in the time that the local zone time of clock internal time source record reaches the school of setting, the open serial ports receive interruption of MCU110, gps receiver 132 passes to MCU 110 in the mode of interrupting by serial ports by the time of reception and address information, MCU110 will convert local standard time to after the data decode receiving, judge again its legitimacy, if data are legal, pass through I
2c bus writes data into internal clocking source module 120, while completing the school to local zone time.
MCU110 can read local zone time before data are write to internal clocking source module 120, and judges whether local zone time and local standard time have larger error, if flow process when the motor after having can start GPS school time chases after.When GPS receives school, flow process is as shown in Figure 5:
S41: the time while judging whether to arrive school, and complete when school and be designated 1, if so, enter S42, if not, enter step S43;
S42: complete mark clear 0, it is clear 0 that GPS finishes receiving mark when in the school, gps data receiving register is clear 0, allows serial ports receive interruption;
S43: whether be 0, if so, enter S44 if completing mark while judging school, if not, finishes while receiving school;
S44: whether receive gps data, if so, enter S45, if not, finish while receiving school;
S45:GPS time and address date decoding;
S46: the UTC time is converted to local time T1;
S47: read time T in internal clocking source module 0 buffer memory, upgrade internal clock source inside modules data T0 with local time T1, path time when chasing after when contrast T0 calculates the shortest chasing after with local time T1, mark position 1 while chasing after;
S48: close serial ports receive interruption, complete and be designated 1 while putting school, receive when school and finish, flow process when entering motor and chasing after.
The position feed back signal that S14:MCU110 receiving position detection module 140 detects;
S15:MCU110 determines pointer current time according to position feed back signal;
S16:MCU110 contrast pointer current time and internal clocking source module time, whether life period was poor, and flow process when if so, opening motor and chasing after, if not, finishes.
Specifically in the present embodiment, position detecting module 140 comprises that time-division pointer position detects and second pointer position detects, and is made up of infrared optocoupler.Position detecting module 140 is determined the position of time-division pointer and second pointer by optoelectronic switch, MCU110 compares the pointer position feedback time and the internal time that receive, in the time having error to exist, opens auto retrieving time flow process.
Refer to Fig. 6, specifically in the present embodiment, while choosing, pointer time-division pointer position signals in the time that position minute pointer was ten two positions in 6 o'clock is low level, in the time of other positions, is high level, second, pointer was low level 12 position second of time pointer position signals, was high level in other positions.When time-division pointer position signals is low level, show that pointer current instruction time is AM 6:00 or PM 6:00, if now the internal time of internal clocking source module 120 is not 6 o'clock sharps or 18 o'clock sharps, illustrate and have error between the two, so local zone time is converted into 12 hours systems, can calculates error size by MCU 110, and path and time while chasing after while calculating the shortest chasing after according to error, and be designated 1 will chase after time, flow process when then entering motor and chasing after.Following steps when its particular location feedback synchronously chases after:
S51: whether be low level, if so, enter S52 if detecting time-division position feed back signal, if not, enter S55;
S52: the current pointer time is 06:00, reads the local standard time;
S53: whether the local standard time is 06:00 or 18:00, if so, enters S30, if not, enters S31;
S54: local standard time conversion is become to 12 hours systems, path and time while chasing after while calculating the shortest chasing after according to local zone time and the difference of pointer time, and be designated 1 will chase after time, flow process when then entering motor and chasing after;
S55: second hand position feed back signal is that low level and local zone time are 0 point of non-zero seconds, if so, enters S56, and if not, position feedback finishes while synchronously chasing after;
S56: second motor drives and stops;
S57: local zone time second is 0;
S58: second motor drives and starts.
In the specific embodiment of the present invention, motor drive module 170 comprises time-division electric machine controller 172 and second electric machine controller 174, and described motor drive module 170 is controlled the rotation of motor and stops, rotation direction and rotating speed.Separated motor when time-division electric machine controller 172 is controlled, when having while normally walking, chasing after at a high speed and stop 3 duties; Electric machine controller 174 control second motors, only had while normally walking and stopped two kinds of duties second.MCU110 is in the time that actuating motor chases after before program, and when can be according to the shortest the chasing after of calculated in advance time, path determines, separated motor is that forward is while chasing after at a high speed or while oppositely chasing after at a high speed.Be greater than local zone time when the pointer time, and both differences are less than 21600 seconds, time separated motor inverse clock while chasing after at a high speed, be greater than when clockwise chases after; Be less than local zone time when the pointer time, and both differences are less than 21600 seconds, time separated motor clockwise while chasing after at a high speed, be greater than when inverse clock chases after.The pointer time here and local zone time are to be all converted into the 12 hours time after system.In the time that actuating motor chases after when process, first judge while chasing after mark be whether 1 and while chasing after state be denoted as 0, will chase after time, Status Flag is set to 1, then during according to the shortest chasing after, path arranges motor steering and rotating speed, this rear motor is state in the time chasing after at a high speed, and in the time that current time equals to chase after, when the time, motor returns to state while normally walking, its idiographic flow as shown in Figure 7, comprises the steps:
S17: judge while chasing after, whether flag is 1, while chasing after, status indicator is 0, if so, enters S18, if not, enters S19;
S18: while chasing after, status indicator is 1, state when path setting motor chases after during according to the shortest chasing after;
S19: judge while chasing after, whether status indicator position is 1, if so, enters S20, if not, finishes while chasing after;
S20: whether detect current time==time while chasing after, if so, enter S21, if not, finish while chasing after;
S21: while chasing after, flag is clear 0, while chasing after, status indicator is clear 0, sets motor status state when normally walking.
While implementing pointer clock calibration method of the present invention, adopt the complementary intelligent control method of the two closed loops of reaction type synchronous tracking and GPS automatic calibration, during using outside school, gps signal and internal clock source combine as the time base of system, external GPS correcting delay signal can be calibrated internal clock source on the one hand, after internal time is calibrated, time hand of a clock while chasing after during by GPS school process keep synchronizeing with the internal reference time, can eliminate the internal clock source cumulative errors that cause because of reasons such as temperature drifts; Position feed back signal and internal reference time compare on the other hand, in the time having error to produce, time hand of a clock while synchronously chasing after by position feedback process calibrate, can eliminate because driving or machinery is transported the error of generation, form the complementary pointer control of two closed loops.After system cut-off, needn't rely on accumulator pointer is driven into reference position, but record pointer instruction time now by internal storage, while chasing after for incoming call.When system powers on again, needn't rely on the pointer positioning signal of 12 positions, can memory based power-off time, path while calculating the shortest chasing after, when launching intelligence and chasing after, while chasing after, the time is short.
This pointer clock calibration method, while chasing after during by external GPS school, complete when internal time is synchronizeed with the standard time, synchronously chased after by position feedback, complete pointer instruction time and internal time synchronous, form the complementary pointer control of two closed loops, realize pointer instruction time with the internal standard time, synchronize with gps time, whole synchronizing process principle is simple, adaptive ability is strong, and that pointer synchro control is operated in is parallel, redundancy, the mode of checking mutually, has improved greatly the reliability of controlling.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (5)
1. a pointer clock calibration method, it is characterized in that, described pointer clock comprises MCU(110) and with MCU(110) the internal clocking source module (120), GPS receiver module (130), position detecting module (140), detection of power loss module (150), memory module (160) and the motor drive module (170) that are connected, in described internal clocking source module (120), be provided with rechargeable battery, in the time of external power source power down, when described rechargeable battery maintains normally walking of internal clocking, described calibration method comprises the following steps:
S01: detection of power loss module (150) detects external power source power down;
S02: local time when memory module (160) is preserved power down is the power down time;
S03: in the time that external power source powers on, MCU(110) the power down time of reading and saving in memory module (160), time when local time when contrast powers on and power down Time Calculation go out to chase after;
S04: flow process when time unlatching motor chases after when what motor drive module (170) basis calculated chases after.
2. pointer clock calibration method according to claim 1, is characterized in that, after powering on and completing while chasing after, also comprises the calibration to internal time, comprises the following steps:
S05:GPS receiver module (130) receives UTC time signal and position signalling;
S06:MCU(110) convert local standard time T1 to according to obtained UTC time signal and position signalling, MCU(110) time T 0 of buffer memory internal clocking source module (120), and T1 is write to internal clocking source module (120) as internal time;
S07:MCU(110) whether life period is poor for contrast T1 and T0, and flow process when if so, opening motor and chasing after, if not, finishes.
3. pointer clock calibration method according to claim 2, it is characterized in that, described S05 step further comprises: first judge whether to meet the condition that gps data receives: time and carrying out while not having other to chase after while arriving timing GPS school, in the time that above-mentioned condition meets, open gps data and receive flow process, first opening serial ports interrupts, wait for that serial ports interrupts obtaining gps data, gps data is decoded and extract UTC time and positional information, the flow process that described gps data receives is:
S08: the time while judging whether to arrive school, and whether be 1, if so, enter S09 if completing mark when school, if not, enter step S10;
S09: complete mark clear 0, it is clear 0 that GPS finishes receiving mark when in the school, gps data receiving register is clear 0, allows serial ports receive interruption;
S10: whether be 0, if so, enter S11 if completing mark while judging school, if not, data receiver finishes;
S11: whether receive UTC time and positional information, if so, GPS finishes receiving mark and puts 1, enters S12, and if not, data receiver finishes;
S12:UTC time and position data decoding;
S13: close serial ports receive interruption, complete and be designated 1 while putting school, gps data receives and finishes.
4. pointer clock calibration method according to claim 1, it is characterized in that, position detecting module (140) is for detection of the position of time-division pointer and second pointer, when MCU (110) detects the position feed back signal of time-division pointer and second pointer, if and motor while chasing after flow process and gps data receive flow process when underway, will executing location feed back flow process while synchronously chasing after, when described position feedback synchronously chases after, flow process comprises the following steps:
S14:MCU(110) position feed back signal that receiving position detection module (140) detects;
S15:MCU(110) determine pointer current time according to position feed back signal;
S16:MCU(110) whether life period is poor contrast pointer current time and the internal clocking source module time, and flow process when if so, opening motor and chasing after, if not, finishes.
5. according to the pointer clock calibration method described in claim 1,2 and 4 any one, it is characterized in that, when described motor chases after, flow process comprises the following steps:
S17: judge while chasing after, whether flag is 1, while chasing after, status indicator is 0, if so, enters S18, if not, enters S19;
S18: putting status indicator while chasing after is 1, path setting motor rotation direction and rotating speed during according to the shortest chasing after;
S19: judge while chasing after, whether status indicator position is 1, if so, enters S20, if not, finishes while chasing after;
S20: whether detect current time==time while chasing after, if so, enter S21, if not, finish while chasing after;
S21: while chasing after, flag is clear 0, while chasing after, status indicator is clear 0, sets motor status state when normally walking.
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| CN105988364B (en) * | 2015-02-15 | 2019-06-21 | 山东省北极星时间测量工程技术研究中心 | A kind of point-to-point indoor clock calibration method and indoor clock timing system |
| CN106033376A (en) * | 2015-03-20 | 2016-10-19 | 深圳市航电技术研究院 | Fault tolerance processing method and device for clock jumping |
| CN106033376B (en) * | 2015-03-20 | 2019-11-15 | 深圳市航电技术研究院 | Clock transition fault-tolerance processing method and device |
| CN105607462A (en) * | 2016-03-10 | 2016-05-25 | 飞亚达（集团）股份有限公司 | Pointer calibration method and device for pointer type clock |
| CN107145064A (en) * | 2017-07-14 | 2017-09-08 | 成都天奥电子股份有限公司 | A kind of clock changes the time keeping method after battery |
| CN108319192A (en) * | 2018-01-19 | 2018-07-24 | 山东大学 | Method when turret clock control system and turret clock power down chase after |
| CN108469725A (en) * | 2018-03-27 | 2018-08-31 | 国网河北省电力有限公司电力科学研究院 | Clock calibration method and terminal device |
| CN113031424A (en) * | 2019-12-24 | 2021-06-25 | 斯沃奇集团研究及开发有限公司 | Timepiece with mechanical movement and correction device for correcting the displayed time |
| CN113031424B (en) * | 2019-12-24 | 2022-04-01 | 斯沃奇集团研究及开发有限公司 | Timepiece with mechanical movement and correction device for correcting the displayed time |
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Application publication date: 20140618 |