Solution for achieving precise timing and time synchronizati

Precise Timing and Synchronization Solution for Coal Mines and Mining Sites - GPS/Beidou Synchronized Clock

 

This solution specifically caters to precise timing and synchronization needs in mining environments.

 

In mining scenarios, satellite positioning signals (GPS/Beidou) cannot penetrate the thick coal and rock layers to reach underground areas. Consequently, various sensors and communication devices in mines cannot obtain precise time information. In the past, most coal mining enterprises relied on NTP for time synchronization, but NTP accuracy did not meet the requirements. Thus, improving time synchronization resistance to interference, consistency, and accuracy is a critical technical challenge.

 

 

The T800 high-performance clock server is widely applicable in fields such as government, defense, finance, securities, insurance, mobile communications, cloud computing, e-commerce, energy and power, oil and petrochemicals, industrial automation, intelligent transportation, security, smart cities, and IoT.

 

- PTP: Master-slave synchronization accuracy of 10ns, user terminal synchronization accuracy of 100ns (with a standard network card)

- NTP: User terminal synchronization accuracy of 100μs

- Supports 256 PTP unicast clients, unlimited multicast clients

- NTP request rate: 23,000 requests/second

- Can be connected to another clock server to form a 2-level clock

 

- ITU-T G.8261, G.8265, G.8275

- ITU-T G.8273 T-GM, T-BC, and T-TSC

- ITU-T G.8262 (SyncE) EEC Options 1 & 2

- ITU-T G.812 Type III, IV

- ITU-T G.813 Option 1

- Telcordia GR1244, GR253 (Stratum 3/3E)

 

- Supports PTP+NTP protocols without additional hardware support

- Low client synchronization accuracy of 100 nanoseconds

- Full GNSS support (GPS, Beidou, Galileo, GLONASS)

- Supports 1G/10G/40G Ethernet

- Supports 1PPS+serial, IRIG-B, parallel port, GPIO, and PTP input

- Built-in high-performance crystal oscillator (8μs accuracy within 24 hours) or optional Rubidium clock (200ns accuracy within 24 hours)

- Advanced anti-interference and deception detection algorithms

- Supports boundary clock, transparent clock, and ordinary clock

- Compatible with IPv6 and IPv4 protocols

- Structural design compatible with single power supply, redundant power supply, or DC power supply

- Supports Layer 2 and Layer 4 UDP protocols

- Supports on-demand and multicast delivery, as well as Best Master Clock (BMC) algorithm

- Supports 5/10/20/25MHz frequency output

- Supports one-step and two-step measurement message mechanisms

- High-precision PPS synchronization and output for clock delivery, verification, and demonstration

- Supports domestic Kylin operating system

- Delay measurement mode supports point-to-point and end-to-end modes

- Supports regular and 1588 switches

- Compatible with PC, server, and laptop

- Monitoring function with time synchronization accuracy

- Strong anti-interference capability, supports wide-range dynamic time adjustment and debugging

- All network ports support PTP and regular network communication

- Supports heartbeat detection and bonding function

- Intuitive network management interface for user control and management

- Application in finance, securities, defense, industrial automation, and big data centers

 

 

1. To overcome the limitations of existing technologies in mining environments, this invention provides a precise time synchronization method based on mines, which enables accurate time synchronization. In case of network failures, time synchronization can be achieved through auxiliary time synchronization (optical pulse synchronization) methods.

2. The technical solution employed in this invention includes:

   - A time synchronization service system, simultaneous synchronization base stations, and mining equipment.

   - The time synchronization service system communicates with the simultaneous synchronization base station, and the mining equipment communicates with the simultaneous synchronization base station.

3. The time synchronization service system extracts and synchronizes time using proprietary time algorithms to improve accuracy.

4. The simultaneous synchronization base station serves as the master clock for time synchronization and manages time synchronization of mining equipment comprehensively.

5. The mining equipment (slave clock) is equipped with Ethernet ports and optical pulse interfaces. It receives the 1PPS/TOD (Time of Day) from the master clock's time engine as input (additional source for PTP) and outputs PTP and precise timing signals for time synchronization. In the event of network failures, auxiliary time synchronization (optical pulse synchronization) can be used.

6. The simultaneous synchronization base station supports PTP network mode or optical pulse auxiliary mode.

7. The mining equipment (slave clock) is equipped with Ethernet ports and optical pulse interfaces, running all components required for PTP clock operation, including the complete IEEE 1588-2008 protocol stack, CPU, clock recovery servo algorithm, TOD generation, and receiving mechanisms. The transparent transmission technology of the mining equipment allows for low-latency, fully transparent gigabit line-speed data channels between existing data links and allows for hierarchical design of the host system.

8. The advanced enhanced time recovery algorithm can accurately recover the clock in environments with high traffic load, congestion, and large packet delay variations (PDV).

9. The structure provided by this invention offers the following advantages:

   - Enables time synchronization by receiving 1PPS/TOD from GNSS (GPS, GLONASS, Beidou) time engines through the network as input (additional source for PTP) and outputting PTP and precise timing signals.

   - Enhances time synchronization resistance to interference, consistency, and synchronization accuracy in mining environments by using optical pulse synchronization as an auxiliary method in unstable network conditions.

 

Please note that the accompanying drawings are intended to provide a further understanding of the present invention and form part of the specification. They are used in conjunction with the embodiments of the present invention to explain the invention and do not limit the scope of the present invention.

 

Although embodiments of the present invention have been disclosed and described, it will be understood by those skilled in the art that various modifications, replacements, and variations can be made without departing from the spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. It should be understood that for those ordinary skilled in the art, without departing from the principle of the present invention, various changes, modifications, substitutions, and alterations can be made to the embodiments described herein. All such changes, modifications, substitutions, and alterations fall within the protection scope of the present invention.