CN102944992B - Real-time clock timing device and method thereof in online monitoring of high-voltage line arrester - Google Patents
Real-time clock timing device and method thereof in online monitoring of high-voltage line arrester Download PDFInfo
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- CN102944992B CN102944992B CN201210511047.5A CN201210511047A CN102944992B CN 102944992 B CN102944992 B CN 102944992B CN 201210511047 A CN201210511047 A CN 201210511047A CN 102944992 B CN102944992 B CN 102944992B
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Abstract
The invention provides a real-time clock timing device and a method thereof in online monitoring of a high-voltage line arrester, mainly aiming to solve the timing problem in the online monitoring of the high-voltage line arrester. The method specifically comprises the steps that: a shortwave receiving unit receives a shortwave time signal, and obtains integral point timing pulses which are several continuous pulse signals, through demodulation; a timing pulse conversion module converts the demodulated integral point timing signal into an integral point synchronous pulse-per-second signal; and an RTC (Real Time Clock) clock chip realizes integral point timing by means of the integral point pulse-per-second signal. The real-time clock timing device performs integral point timing on the real-time clock chip (RTC) once or twice each day by means of the national 5 MHz or 10 MHz shortwave timing system so that the time of day is accurate within one hundred milliseconds; the timing accuracy of the shortwave timing system is 1-3 milliseconds by means of ionospheric propagation; and the receiving system is low in manufacturing cost and not limited by natural conditions, and is very suitable for wild timekeeping or timing application.
Description
Technical field
The present invention relates to high-voltage line lightning arrester on-line monitoring, the problem when school that mainly solves real-time clock (RTC) Accumulated deviation.For the accurate recording thunderbolt moment provides safeguard.
Background technology
Because leakage conductor is installed on high voltage line iron tower, aerial in height, high-tension line corridor majority is in the place having inconvenient traffic, human footmarks are rare, also to cross over a hill, cross a river is across river etc., patrol and examine difficult in maintenance greatlyr, the urgency of on-line monitoring increases severely day by day, records the thunder and lightning moment particularly outstanding; In thunder and lightning prone areas, hi-line the most easily meets with thunderbolt, causes line tripping, line attendant urgently will be known the correct time that thunderbolt occurs, with analysis of failure, avoid all reasons to be attributed to thunderbolt and concealed equipment faults itself, further cause larger loss; Meanwhile, for line attendant carries out line upkeep and line thunder protection provides reference frame.
At present, most real-time timepiece chip (RTC:Real-Time Clock) timing modes that adopt, but, because there is accuracy of timekeeping problem in clock chip, pass in time timing generation deviation, time, longer cumulative errors were larger, if calibration not in time, the thunderbolt moment of recording can be caused erroneous judgement or misjudgement to analysis circuit tripping operation.
Country's shortwave time dissemination system, includes time (UTC) information, platform is exhaled (BPM) information etc., repeats once per half an hour, utilizes ionospheric propagation, time service error 1-3 millisecond; The markers of leakage conductor on-line monitoring adopts real-time timepiece chip (RTC) more, its precision is generally in ± 3PPM left and right, taking ± 3PPM as example, day accumulation maximum error ± 260 millisecond, to secondary, can meet the requirement of real-time of leakage conductor on-line monitoring to real-time timepiece chip (RTC) synchronous an every day.
Summary of the invention
For solving above technical matters, the invention provides real-time clock correction device and method thereof in a kind of high-voltage line lightning arrester on-line monitoring, while utilizing national 5MHz or 10MHz shortwave time dissemination system to carry out an integral point school to secondary every day to real-time timepiece chip (RTC), Time of Day is accurately in hundred milliseconds.
For achieving the above object, the present invention is by the following technical solutions:
Real-time clock correction device in a kind of high-voltage line lightning arrester on-line monitoring, comprise the short-wave reception unit of pulse when receiving shortwave time signal and reconciling out school when whole, pulse converter unit when school clock pulse red switch becomes the school of integral point synchronization pulse second when whole,, the output terminal of pulse converter unit and the input end of real-time timepiece chip are connected when in described the school.
As the preferred embodiments of the present invention, the wavelength of described shortwave time signal is 5MHz or 10MHz.
As the preferred embodiments of the present invention, described when whole when school pulse be continuous multiple pulse signal.
A real-time clock calibration method in high-voltage line lightning arrester on-line monitoring, short-wave reception unit receives shortwave time signal, and pulse while demodulating integral point school, is continuous several pulse signals; , the integral point correcting delay signal of demodulation is transformed into integral point synchronization pulse second by pulse conversion module when in the school, when RTC clock chip utilizes integral point pps pulse per second signal to realize integral point school.
As the preferred embodiments of the present invention, the implementation method of described integral point pulse per second (PPS) is: first radiothermy demodulation techniques parse integral point BPM Morse and call out code, taking Morse code finish time as reference, produce a pulsewidth and be the monopulse of 2000 milliseconds, taking this monopulse as thresholding, again occur that first zero-crossing pulse in 10 pulses is integral point pulse per second (PPS).
As the preferred embodiments of the present invention, the implementation method of described integral point pulse per second (PPS) is: short-wave reception unit receives after shortwave time signal, application shortwave demodulation techniques demodulate temporal information code, application of synchronized coherent demodulation technology parses BPM Morse platform and exhales code in temporal information code, taking this yard of finish time as reference, produce (2000+150) ms single pulse signal, using this pulse as thresholding, with the temporal information code of demodulation be multiple-pulse phase with, can obtain a second synchronizing pulse.
As the preferred embodiments of the present invention, described RTC clock chip produces synchronous enabled, only allows integral point synchronous second synchronous enabled effective delicacies of the season.
Compared with prior art, correction device of the present invention and method thereof at least have the following advantages: shortwave time dissemination system, utilize ionospheric propagation, time service precision 1-3 millisecond, when the present invention utilizes national 5MHz or 10MHz shortwave time dissemination system to carry out an integral point school to secondary every day to real-time timepiece chip (RTC), Time of Day is accurately in hundred milliseconds, and receiving system is cheap, not limited by natural conditions, while being very applicable to field timing or school, apply.
Brief description of the drawings
Fig. 1 is the structured flowchart of the real-time clock correction device in high-voltage line lightning arrester on-line monitoring of the present invention.
Fig. 2 is BPM country's shortwave time service platform broadcast program of the present invention and time signal format chart.
Fig. 3 is BPM shortwave time service demodulation of the present invention and the integral point synchronous schematic diagram that produces second.
Fig. 4 enables EN sequential chart while being integral point pulse per second (PPS) SP of the present invention and school.
Embodiment
Describe the present invention below in conjunction with accompanying drawing:
Real-time clock correction device in high-voltage line lightning arrester on-line monitoring of the present invention comprises short-wave reception unit, pulse converter unit when school, and RTC time chip, described short-wave reception unit is used for receiving shortwave time signal, the 5MHz that country's shortwave time service platform sends or the information reference table 1 that gives the correct time of 10MHz, short-wave reception unit receives after shortwave time signal, application shortwave demodulation techniques demodulate temporal information code, application of synchronized coherent demodulation technology parses BPM Morse platform and exhales code in temporal information code, taking this yard of finish time as reference, produce (2000+150) ms single pulse signal, using this pulse as thresholding, with the information code of demodulation be multiple-pulse phase with, can obtain a second synchronizing pulse (multiple-pulse), when within this second, synchronizing pulse is sent to school, in pulse converter unit, can obtain integral point synchronizing pulse second (monopulse) through monostable circuit, second synchronizing pulse using this pulse as real-time timepiece chip RTC carries out time synchronized, referring to Fig. 2 (the time service demodulation of BPM shortwave and the integral point synchronous schematic diagram that produces second).
According to accuracy requirement and manufacturing cost requirement, synchronously can meet once or twice accuracy of timekeeping requirement every day, so produce synchronous enabled (EN) by RTC, only just carry out integral point effectively time at synchronous enabled (EN) synchronous second, make synchronization point controlled.Because short-wave signal passes through ionospheric propagation, night signal is relatively stable, in conjunction with TRC to time feature, multiselect is in the time that midnight, integral point carried out school, so, utilize the timing function of RTC to produce pulse enable SP signal when school, the control when reaching integral point school or when multiple integral points school, the i.e. object of " while allowing some school with regard to some school time ", sequential relationship enables EN sequential chart during with reference to figure 3(integral point pulse per second (PPS) SP and school).
Claims (5)
1. the real-time clock calibration method in high-voltage line lightning arrester on-line monitoring, is characterized in that: short-wave reception unit receives shortwave time signal, and pulse while demodulating integral point school, is continuous several pulse signals; , the integral point correcting delay signal of demodulation is transformed into integral point synchronization pulse second by pulse conversion module when in the school, when RTC clock chip utilizes integral point pps pulse per second signal to realize integral point school; The implementation method of described integral point pulse per second (PPS) is: first radiothermy demodulation techniques parse integral point BPM Morse and call out code, taking Morse code finish time as reference, produce a pulsewidth and be the monopulse of 2000 milliseconds, taking this monopulse as thresholding, again occur that first zero-crossing pulse in 10 pulses is integral point pulse per second (PPS); Described RTC clock chip produces synchronous enabled, only just allows integral point synchronous second synchronous enabled when effective.
2. the real-time clock calibration method in high-voltage line lightning arrester on-line monitoring, is characterized in that: short-wave reception unit receives shortwave time signal, and pulse while demodulating integral point school, is continuous several pulse signals; , the integral point correcting delay signal of demodulation is transformed into integral point synchronization pulse second by pulse conversion module when in the school, when RTC clock chip utilizes integral point pps pulse per second signal to realize integral point school; The implementation method of described integral point pulse per second (PPS) is: short-wave reception unit receives after shortwave time signal, application shortwave demodulation techniques demodulate temporal information code, application of synchronized coherent demodulation technology parses BPM Morse platform and exhales code in temporal information code, taking this yard of finish time as reference, produce (2000+150) ms single pulse signal, using this pulse as thresholding, with the temporal information code of demodulation be multiple-pulse phase with, can obtain a second synchronizing pulse; Described RTC clock chip produces synchronous enabled, only just allows integral point synchronous second synchronous enabled when effective.
3. the real-time clock correction device in the high-voltage line lightning arrester on-line monitoring of employing calibration method as described in any one in claim 1-2, it is characterized in that: the short-wave reception unit that comprises pulse when receiving shortwave time signal and reconciling out school when whole, pulse converter unit when school clock pulse red switch becomes the school of integral point synchronization pulse second when whole,, the output terminal of pulse converter unit and the input end of real-time timepiece chip are connected when in described the school.
4. the real-time clock correction device in a kind of high-voltage line lightning arrester on-line monitoring as claimed in claim 3, is characterized in that: the wavelength of described shortwave time signal is 5MHz or 10MHz.
5. the real-time clock correction device in a kind of high-voltage line lightning arrester on-line monitoring as claimed in claim 3, is characterized in that: described when whole when school pulse be continuous multiple pulse signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210511047.5A CN102944992B (en) | 2012-11-30 | 2012-11-30 | Real-time clock timing device and method thereof in online monitoring of high-voltage line arrester |
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| CN201210511047.5A CN102944992B (en) | 2012-11-30 | 2012-11-30 | Real-time clock timing device and method thereof in online monitoring of high-voltage line arrester |
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| CN102944992B true CN102944992B (en) | 2014-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104007652A (en) * | 2014-06-16 | 2014-08-27 | 管存忠 | Method for reducing electronic timing error |
| CN108333916B (en) * | 2018-03-15 | 2020-05-19 | 中国科学院国家授时中心 | BPM short wave time service signal and timing method based on Chirp signal |
| CN110824897B (en) * | 2019-11-22 | 2021-03-09 | 中国地震局地质研究所 | Synchronous time service system among various collectors |
| CN114051276B (en) * | 2021-11-18 | 2024-04-12 | 许昌许继软件技术有限公司 | Serial time code time service method, system and electronic equipment |
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| JP2002244937A (en) * | 2001-02-20 | 2002-08-30 | Fujitsu General Ltd | Clocking system utilizing lan |
| CN101807044B (en) * | 2009-12-18 | 2011-08-10 | 安徽鑫龙电器股份有限公司 | Clock timing method of multifunctional meter |
| CN101795167B (en) * | 2010-01-27 | 2013-04-17 | 中国人民解放军理工大学 | High-precision time-delay precompensation optical fiber timing method |
| CN202257089U (en) * | 2011-09-28 | 2012-05-30 | 杭州科利特信息技术有限公司 | Time synchronization device |
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