CN1469215A - Long-wave time service code - Google Patents
Long-wave time service code Download PDFInfo
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- CN1469215A CN1469215A CNA021146764A CN02114676A CN1469215A CN 1469215 A CN1469215 A CN 1469215A CN A021146764 A CNA021146764 A CN A021146764A CN 02114676 A CN02114676 A CN 02114676A CN 1469215 A CN1469215 A CN 1469215A
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Abstract
The present invention relates to reasonably coded long-wave time service code for Chinese civil time service technology. The present invention features that the long-wave time service code BPC code is squared slow code and each frame contains year, month, day, hour, minute and other time information, verification mark and other information. One second is one BIT, and different duty cycle represents different meanings. The signal processing includes timed data acquisition, recording delay and position of high and low levels and calculating all the time information with specified weight value. Compared with available technology, the present invention has improved encoding sequence, information format, information safety, capacity space, verification matching and other performance.
Description
Affiliated technical field: the present invention relates to a kind of long-wave time service code that transmits and receives that is used for Chinese civilian Service of Timing.
Background technology: recent two decades occurs with atomic clock in the world as the low-frequency time-code Service of Timing (RCT) in a kind of high precision clock source and greatly developed.The mid-80 at first is applied to civil area with low radio frequency time-code Service of Timing by German Rong Han Si (Junghans) company.
The principle of RCT technology is: build long wave time signal transmitting station and the standard time is encoded, utilize low frequency (20KHz-80KHz) carrier system that time signal is launched with the radiowave form.Wireless long wave control time set is then by the interior integrated receiving chip automatic reception of the little processing radio time coding signal of establishing, automatically decode by the custom-designed built-in processing integrated chip that declines again, decoding back is mechanism and alignment time during the walking of control time set automatically synchronously, time set is received and the standard time of time of showing and long wave time signal transmitting station keeps unification.At present, Germany, the U.S., Britain and Japan etc. extensively adopt the long wave Service of Timing to be applied to the product for civilian use.The time service transmitting station covering radius 1500KM that Germany sets up is the earliest time signal platform in the world at present, transmission frequency 77.5KHz, and code system is DCF.Britain has set up covering radius 1200KM time service transmitting station, and frequency is 60KHz, and code system is MSF.The time service platform radius of the U.S. is 2000KM, and frequency is 60KHz, code system WWVB.The Japan in Asia its emission electric wave covering radius 1000KM, frequency is 40KHz, code system JJY/JG2AS.
It is long that present external these long wave time service coding techniques ubiquities that adopt the reception decode time, and efficient is low, is disturbed easily, and the problem that the bit error rate is high is unfavorable for the assurance and the raising of product quality simultaneously.
Summary of the invention: for avoiding the defective of prior art, improve the utilization rate of efficient coding information, strengthen information capacity, the confidentiality of enhancing information and workability, the long-wave time service code BPC sign indicating number that the present invention proposes, adopted more reasonably coding techniques, made to receive decoding speed and improve greatly, for the widespread use of time service product provides the foundation.It is characterized in that: long-wave time service code BPC sign indicating number is the slow sign indicating number of square waveform, and a frame information has comprised year, month, day, hour, min equal time information and check mark and other information contents.Represent different meanings by the difference of dutycycle.Signal Processing is with timer timing acquiring data, and the time-delay and the position of record high-low level use the weights of regulation to calculate all temporal informations then.
The coding techniques that the present invention proposes, with respect to original Germany's (DCF sign indicating number) that is applied to, U.S.'s (WWVB sign indicating number), the civilian long-wave time service code technology in zone such as Britain's (MSF sign indicating number) and Japan's (JJY sign indicating number), make at coded sequence information format, information security, volume space, the performance of aspects such as verification cooperation and headspace all is improved.And adapted to the requirement that transmits and receives of Chinese civilian Service of Timing better, guaranteed to use the practicality of product, can prevent the appearance of counterfeit and shoddy goods, the information rate and the decoding efficiency of product have been improved simultaneously, increased the decoding success ratio, for the quality of product provides technical guarantee, and for civilian long wave Service of Timing improve constantly and development is laid a good foundation.
Description of drawings: the embodiment PC standard time generator block diagram of system
Embodiment: existing the present invention is described further in conjunction with the accompanying drawings:
This invention technology can be applicable to correct time is had many aspects of requirement.As use " the PC standard time generator " of the development of this invention technology.It receives BPC sign indicating number standard time information, handles the cmos clock that removes to proofread and correct in real time PC by analysis.The block diagram of system as shown in the figure.System forms: be made up of lf time-code signal receiver and signal processor, display.Wherein the lf time-code signal receiver is made up of receiving antenna, prime amplifier, tuned amplifier, auto-gain circuit, wave filter, detuner etc., and signal processor (PC) is finished signal decoding.Its principle is: wireless lf time-code signal receives by receiving processor, amplify through prime amplifier, amplifier output is delivered to tuned amplifier and is carried out the frequency-selecting amplification, carry out filtering, shaping, demodulation then, PC decoding processing, the real-time time information after the reduction are delivered to that display shows and are proofreaied and correct the cmos clock of PC in real time.
" PC standard time generator " be a kind of accuracy of timekeeping height, the generation standard time generator of accurate synchronously when walking, automatic correcting time, and this product can be widely used in the computing machine and the computer network system in fields such as finance, traffic, communication.
Claims (3)
1, plant long-wave time service code, it is characterized in that: long-wave time service code BPC sign indicating number is the slow sign indicating number of square waveform, and a frame information has comprised year, month, day, hour, min equal time information and check mark and other information contents.
2, the described long-wave time service code of claim 1 is characterized in that: one second is a BIT position, and time signal is a BPC sign indicating number form.
3, long-wave time service code as claimed in claim 1 or 2 is characterized in that: Signal Processing is with timer timing acquiring data, and the time-delay and the position of record high-low level use the weights of regulation to calculate all temporal informations then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021146764A CN1469215A (en) | 2002-07-15 | 2002-07-15 | Long-wave time service code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021146764A CN1469215A (en) | 2002-07-15 | 2002-07-15 | Long-wave time service code |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1469215A true CN1469215A (en) | 2004-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021146764A Pending CN1469215A (en) | 2002-07-15 | 2002-07-15 | Long-wave time service code |
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| CN (1) | CN1469215A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572470A (en) * | 2016-02-29 | 2016-05-11 | 江苏林洋能源股份有限公司 | Intelligent watt-hour meter and method of using BPC low frequency timing code for automatic timing |
| CN106940523A (en) * | 2017-03-28 | 2017-07-11 | 北京智芯微电子科技有限公司 | A kind of time service device based on low-frequency time-code technology |
-
2002
- 2002-07-15 CN CNA021146764A patent/CN1469215A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572470A (en) * | 2016-02-29 | 2016-05-11 | 江苏林洋能源股份有限公司 | Intelligent watt-hour meter and method of using BPC low frequency timing code for automatic timing |
| CN106940523A (en) * | 2017-03-28 | 2017-07-11 | 北京智芯微电子科技有限公司 | A kind of time service device based on low-frequency time-code technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |