CN112713955B - Accurate time synchronization method based on mine - Google Patents
Accurate time synchronization method based on mine Download PDFInfo
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- CN112713955B CN112713955B CN202011529198.4A CN202011529198A CN112713955B CN 112713955 B CN112713955 B CN 112713955B CN 202011529198 A CN202011529198 A CN 202011529198A CN 112713955 B CN112713955 B CN 112713955B
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- time synchronization
- mine
- time
- base station
- mining equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses an accurate time synchronization method based on a mine, which comprises a time synchronization service system, a synchronous base station and mine equipment, wherein the time synchronization service system is in communication connection with the synchronous base station; the time synchronization service system extracts and synchronizes time through a special time algorithm, so that the precision is improved; meanwhile, the synchronous base station is used as a master clock of time synchronization, and the time synchronization of the mining equipment is comprehensively managed; the mining equipment (slave clock) is provided with an Ethernet port and an optical pulse interface, and can be used for time synchronization under the normal condition of a network; in the event of a network failure, time synchronization can be performed by optical pulse synchronization. The invention belongs to the technical field of time synchronization of mine equipment, and particularly relates to a mine-based accurate time synchronization method capable of performing accurate time synchronization through auxiliary time synchronization (optical pulse synchronization) under the condition of network failure.
Description
Technical Field
The invention belongs to the technical field of time synchronization of mine equipment, and particularly relates to a mine-based accurate time synchronization method.
Background
In a mine use scenario, satellite positioning signals (GPS/beidou) cannot directly penetrate thick coal and rock layers to reach underground, and various sensors and communication equipment in the mine cannot acquire accurate time. Based on this, most coal mine enterprises have previously mainly resorted to NTP acquisition times. However, NTP is far from being as accurate as required. How to improve the anti-interference capability, consistency and synchronization precision of time service is a technical problem which needs to be solved urgently.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides an accurate time synchronization method based on a mine, which can perform accurate time synchronization and can perform time synchronization through auxiliary time synchronization (optical pulse synchronization) under the condition of network failure.
The technical scheme adopted by the invention is as follows: the accurate time synchronization method based on the mine comprises a time synchronization service system, a synchronous base station and mine equipment, wherein the time synchronization service system is in communication connection with the synchronous base station, and the mine equipment is in communication connection with the synchronous base station;
the time synchronization service system extracts and synchronizes time through a special time algorithm, so that accuracy is improved;
the synchronous base station is used as a master clock of time synchronization and comprehensively manages the time synchronization of the mining equipment;
the mining equipment (slave clock) is provided with an Ethernet port and an optical pulse interface, can receive 1PPS/ToD of a time engine of a master clock as an input (as an additional source of a PTP source) and output PTP and accurate time signals for time synchronization under the normal condition of a network; in the event of a network failure, the time synchronization can be performed by means of auxiliary time synchronization (optical pulse synchronization).
Further, the synchronous base station supports a network mode or an optical pulse auxiliary mode of PTP.
Further, the mining equipment (slave clock) is provided with an Ethernet port and an optical pulse interface, all components required by running a PTP clock, a CPU running a complete IEEE1588-2008 protocol stack, a clock recovery servo algorithm and a ToD generation and receiving mechanism.
Furthermore, the transparent transmission technology of the mining equipment (from a clock) is connected between the existing data links in series, and can provide a low-delay and full-transparent G-bit linear speed data channel after being connected in series, and meanwhile, the host system is allowed to be designed according to a daisy chain structure.
Further, the advanced enhanced time recovery algorithm recovers accurate clocks in environments with large Packet Delay Variations (PDVs) due to high traffic load, congestion.
After the structure is adopted, the invention has the following beneficial effects: according to the mine-based accurate time synchronization method, 1PPS/ToD of a GNSS (global navigation satellite system) time engine (GPS, GLONASS and Beidou) can be received as input (serving as an additional source of a PTP source) through a network and PTP and accurate time signals are output; the mine-based accurate time synchronization method can improve time service anti-interference capability, consistency and synchronization precision by assisting time synchronization through optical pulses due to network instability.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Fig. 1 is a schematic diagram of a mine-based accurate time synchronization method according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the accurate time synchronization method based on the mine comprises a time synchronization service system, a synchronous base station and mine equipment, wherein the time synchronization service system is in communication connection with the synchronous base station, and the mine equipment is in communication connection with the synchronous base station;
the time synchronization service system extracts and synchronizes time through a special time algorithm, so that accuracy is improved;
the synchronous base station is used as a master clock of time synchronization and comprehensively manages the time synchronization of the mining equipment;
the mining equipment (slave clock) is provided with an Ethernet port and an optical pulse interface, can receive 1PPS/ToD of a time engine of a master clock as an input (as an additional source of a PTP source) and output PTP and accurate time signals for time synchronization under the normal condition of a network; in the event of a network failure, the time synchronization can be performed by means of auxiliary time synchronization (optical pulse synchronization).
Wherein, the synchronous base station supports network mode or optical pulse auxiliary mode of PTP; the mining equipment (slave clock) is provided with an Ethernet port and an optical pulse interface, runs all components required by a PTP clock, runs a CPU of a complete IEEE1588-2008 protocol stack, a clock recovery servo algorithm and a ToD generation and reception mechanism; the transparent transmission technology of the mining equipment (slave clock) is connected between the existing data links in series, and can provide a low-delay and full-transparent G-bit linear speed data channel after being connected in series, and simultaneously, the host system is allowed to be designed according to a daisy chain structure; the advanced enhanced time recovery algorithm recovers accurate clocks in environments with large Packet Delay Variations (PDVs) due to high traffic load, congestion.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (4)
1. A precise time synchronization method based on a mine is characterized by comprising the following steps: the mining equipment comprises a time synchronization service system, a synchronous base station and mining equipment, wherein the time synchronization service system is in communication connection with the synchronous base station;
the time synchronization service system extracts and synchronizes time through a special time algorithm;
the synchronous base station is used as a master clock of time synchronization and comprehensively manages the time synchronization of the mining equipment;
the mining equipment is provided with an Ethernet port and an optical pulse interface, and under the normal condition of a network, 1PPS/ToD of a time engine of a main clock is received as input and PTP and accurate time signals are output for time synchronization; in the event of a network failure, the time synchronization takes place by means of optical pulse time synchronization.
2. The mine-based precision time synchronization method of claim 1, wherein: the synchronous base station supports a network mode or an optical pulse auxiliary mode of PTP.
3. The mine-based precision time synchronization method of claim 2, wherein: the mining equipment is provided with an Ethernet port and an optical pulse interface, all components required by running a PTP clock, a CPU running a complete IEEE1588-2008 protocol stack, a clock recovery servo algorithm and a ToD generation and reception mechanism.
4. A mine-based precision time synchronization method as claimed in claim 3, wherein: the transparent technology of the mining equipment is connected in series between the existing data links, and meanwhile, the host system is allowed to be designed according to a daisy chain structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529198.4A CN112713955B (en) | 2020-12-22 | 2020-12-22 | Accurate time synchronization method based on mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529198.4A CN112713955B (en) | 2020-12-22 | 2020-12-22 | Accurate time synchronization method based on mine |
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| Publication Number | Publication Date |
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| CN112713955A CN112713955A (en) | 2021-04-27 |
| CN112713955B true CN112713955B (en) | 2023-09-19 |
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| CN202011529198.4A Active CN112713955B (en) | 2020-12-22 | 2020-12-22 | Accurate time synchronization method based on mine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313859A (en) * | 2011-08-01 | 2012-01-11 | 中煤科工集团重庆研究院 | Method and system for positioning fault of underground cable on basis of IEEE 1588 (network measurement and control system precision clock synchronization protocol) |
| CN202631981U (en) * | 2012-03-29 | 2012-12-26 | 张作龙 | Device for whole power network accurate synchronous time service and timing used in coal mine |
| CN110798277A (en) * | 2019-09-23 | 2020-02-14 | 湖南矩阵电子科技有限公司 | Time synchronization system and method based on radio frequency optical fiber network |
| CN111064540A (en) * | 2019-12-31 | 2020-04-24 | 河南理工大学 | Mine micro-earthquake monitoring clock synchronization device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7253671B2 (en) * | 2004-06-28 | 2007-08-07 | Intelliserv, Inc. | Apparatus and method for compensating for clock drift in downhole drilling components |
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2020
- 2020-12-22 CN CN202011529198.4A patent/CN112713955B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313859A (en) * | 2011-08-01 | 2012-01-11 | 中煤科工集团重庆研究院 | Method and system for positioning fault of underground cable on basis of IEEE 1588 (network measurement and control system precision clock synchronization protocol) |
| CN202631981U (en) * | 2012-03-29 | 2012-12-26 | 张作龙 | Device for whole power network accurate synchronous time service and timing used in coal mine |
| CN110798277A (en) * | 2019-09-23 | 2020-02-14 | 湖南矩阵电子科技有限公司 | Time synchronization system and method based on radio frequency optical fiber network |
| CN111064540A (en) * | 2019-12-31 | 2020-04-24 | 河南理工大学 | Mine micro-earthquake monitoring clock synchronization device and method |
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| CN112713955A (en) | 2021-04-27 |
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