CN204013564U - Time server - Google Patents
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- CN204013564U CN204013564U CN201420390223.9U CN201420390223U CN204013564U CN 204013564 U CN204013564 U CN 204013564U CN 201420390223 U CN201420390223 U CN 201420390223U CN 204013564 U CN204013564 U CN 204013564U
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Abstract
The utility model provides a kind of time server.This time server is comprised of micro-control unit, gps clock source, ethernet controller, real-time clock (being realtime clock source), electrically-erasable read-only memory, RS232 serial communication module, LED light.Time server adopts modularized design, and volume is small and exquisite, effectively reduces manufacturing cost; Adopt embedded system, without hard disk and fan design, aseismatic design, reliable and stable; Adopt technical grade chip, ℃-80 ℃, working temperature-20, are applicable to outdoor use.
Description
Technical field
The utility model provides a kind of time server.
Background technology
Along with the quick increase of the computer in automated system, control system use amount, the equipment that needs standard time information is also more and more, and also more and more higher to stability, required precision.Utilize reference clock to obtain the real time, the time server that recycling network passes to user time information arises at the historic moment.Time server, as the clock source of whole automated system, can carry out time service to all devices in whole system, is the key that realizes equipment time synchronized in automated system.
Current time server is clock source mainly with GPS geostationary satellite signal, or by Network Time Protocol from other NTP time service central server acquisition time information.The time server that the gps satellite of take is clock source is vulnerable to the impact of wet weather and haze weather, causes the loss of satellite-signal, and the equipment time in system of then causing cannot be synchronous; Take the time server that other NTP time service central servers are clock source, when network breaks down, cannot be connected to time service central server, whole network has just lost the clock source of standard.
Summary of the invention
The utility model provides a kind of time server, has mainly solved the problem existing in background technology.
Concrete technical solution of the present utility model is as follows:
This time server comprises for receiving the gps clock source of gps satellite time signal, for receiving the network clock source of network time, for the realtime clock source of split-second precision is provided; Described gps clock source, network clock source and realtime clock source are all connected with micro-control unit, and micro-control unit is used for judging selects clock source and dissection process procotol, and micro-control unit is also connected with electrically-erasable read-only memory and communication module respectively; Described electrically-erasable read-only memory is for storing device information, make device looses power after readable information keep equipment working state and power down front identical; Described communication module is the passage of micro-control unit and external series devices communicating.
Described micro-control unit is ARM flush bonding processor.
Described gps clock source is transferred to micro-control unit by standard time information with NMEA0183 form by RS232 serial communication interface, and provides the pps pulse per second signal of 1PPS for micro-control unit.
Described network clock source communicates by SPI communication bus and micro-control unit, and network clock source communicates to micro-control unit, to provide network clocking signal by RJ45 physical interface and other network equipments.
Described realtime clock source adopts high accuracy RTC chip, by I2C bus and micro-control unit, communicates.
Described electrically-erasable read-only memory communicates by I2C bus and micro-control unit.
Described communication module is RS232 serial communication module, and the RS232 level conversion that serial device is sent is that Transistor-Transistor Logic level is to micro-control unit.
Advantage of the present utility model is as follows:
This time server adopts the Redundancy Design of three kinds of clock sources can guarantee continuity, the stability of time service; The first clock source gps clock source adopts advanced GPS chip, time service precision Gao Keda 200ns, and NTP service end postpones to reach in 10ms.
This time server adopts modularized design, and volume is small and exquisite, effectively reduces manufacturing cost; Adopt embedded system, without hard disk and fan design, aseismatic design, reliable and stable; Adopt technical grade chip, ℃-80 ℃, working temperature-20, are applicable to outdoor use.
Accompanying drawing explanation
Fig. 1 is the utility model principle assumption diagram.
Drawing reference numeral explanation: 1-RJ45 interface, 2-active antenna, 3-GPS module, 4-ethernet controller, 5-real-time clock, 6-power module, 7-micro-control unit, 8-electricallyerasable ROM (EEROM), 9-level conversion, 10-DB9 interface, 11-LED light, 12-RS232 serial communication module.
Embodiment
The function of time server is time service that continue for the equipment in grid, high-precision, and time server is comprised of micro-control unit, gps clock source, ethernet controller, real-time clock (being realtime clock source), electrically-erasable read-only memory, RS232 serial communication module, LED light.
Microcontroller chip module adopts advanced ARM flush bonding processor STM32F103, and operating frequency is high, and processing speed is fast.Built-in embedded OS, the logic control work of being responsible for whole equipment comprises the state judgement of clock source, selects the parsing of network communication protocol, processing etc.
Gps clock source is three kinds of the highest clock sources of clock source medium priority of equipment, and it adopts high-performance GPS chip 5365RE, and time service precision can reach 200ns and without accumulated error, use active antenna to guarantee to search star speed and connective stability; By Transistor-Transistor Logic level RS232 serial communication interface, standard time information is transferred to micro-control unit with NMEA0183 form, the pps pulse per second signal of 1PPS is also provided for micro-control unit.
The integrated devices at full hardware high-performance of ethernet controller W5500 ICP/IP protocol stack, connects RJ45 physical interface, is responsible for communicating with interior other network equipments of system, and it communicates by SPI communication bus and microcontroller chip.When cannot normally work in gps clock source, the embedded SNTP " client " of microcontroller chip can be initiatively to the time service central server application time service information in network.
Realtime clock source adopts high accuracy RTC chip DS3231, can be controlled in ± 2ppm of precision, and annual error can be controlled in 1 minute, and it communicates by I2C bus and microcontroller chip.As the tertiary clock source of equipment, when gps clock source and the inefficacy of time service central server, can effectively keep stability and the time service precision of equipment time.
The key message such as cycle, product ID when electrically-erasable read-only memory AT24C02 is used for IP address, the school of memory device, readable information after device looses power, keeps equipment working state and power down front the same.Module adopts advanced chip, and erasable number of times reaches 1,000,000 times, and data can keep 100 years.It communicates by I2C bus and microcontroller chip.
RS232 serial communication module is the passage of microcontroller chip and external series devices communicating, and its RS232 level conversion that serial device is sent is that Transistor-Transistor Logic level is to microcontroller chip.
LED light is used to indicate GPS operating state, central server connection status and time service operating state.
Power module by access+5V power supply carries out voltage stabilizing and distributes to each several part and power.
When using equipment, for equipment provides direct current+5V power supply, by netting twine, connect the device to switch or by time service equipment.
Use configuration software that the machine IP address is set, in system, by time service equipment, by this IP address and equipment, communicated the temporal information of acquisition standard.
Use configuration software that time service central server IP address is set, when the GPS of equipment cannot normally work, by this IP address and time service central server, communicate, then the temporal information that obtains standard is transmitted to interior other the equipment of system.
By above shirtsleeve operation and setting, equipment can normally be worked provides standard time information for system.
Claims (8)
1. a time server, comprises the power module for in-line power, it is characterized in that: comprise for receiving the gps clock source of gps satellite time signal, for receiving the network clock source of network time, for the realtime clock source of split-second precision is provided; Described gps clock source, network clock source and realtime clock source are all connected with micro-control unit, and micro-control unit is used for judging selects clock source and dissection process procotol, and micro-control unit is also connected with electrically-erasable read-only memory and communication module respectively; Described electrically-erasable read-only memory is for storing device information, make device looses power after readable information keep equipment working state and power down front identical; Described communication module is the passage of micro-control unit and external series devices communicating.
2. time server according to claim 1, is characterized in that: described micro-control unit is ARM flush bonding processor.
3. time server according to claim 1, is characterized in that: described gps clock source is transferred to micro-control unit by standard time information with NMEA0183 form by RS232 serial communication interface, and provides the pps pulse per second signal of 1PPS for micro-control unit.
4. time server according to claim 1, is characterized in that: described network clock source is ethernet controller; Ethernet controller communicates by SPI communication bus and micro-control unit, by RJ45 physical interface and other network equipments, communicates to micro-control unit, to provide network clocking signal.
5. time server according to claim 1, is characterized in that: described realtime clock source adopts high accuracy RTC chip, by I2C bus and micro-control unit, communicates.
6. time server according to claim 1, is characterized in that: described electrically-erasable read-only memory communicates by I2C bus and micro-control unit.
7. time server according to claim 1, is characterized in that: described communication module is RS232 serial communication module, and the RS232 level conversion that serial device is sent is that Transistor-Transistor Logic level is to micro-control unit.
8. according to the arbitrary described time server of claim 1 to 7, it is characterized in that: described micro-control unit is connected with the LED light that is used to indicate GPS operating state, central server connection status and time service operating state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390223.9U CN204013564U (en) | 2014-07-15 | 2014-07-15 | Time server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420390223.9U CN204013564U (en) | 2014-07-15 | 2014-07-15 | Time server |
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| CN204013564U true CN204013564U (en) | 2014-12-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404137A (en) * | 2015-12-04 | 2016-03-16 | 中国民航大学 | BD2/GPS-based high-precision synchronous time display and time service apparatus and operating method thereof |
| CN106154816A (en) * | 2016-07-14 | 2016-11-23 | 南京国电南自电网自动化有限公司 | A kind of punctual method of automaton high accuracy |
| CN107229218A (en) * | 2017-06-20 | 2017-10-03 | 中通客车控股股份有限公司 | The multiple clock sources correction device and method of a kind of vehicle-mounted TBOX systems |
| CN114006673A (en) * | 2021-10-29 | 2022-02-01 | 上海宝冶集团有限公司 | Time service server, time service method and equipment |
-
2014
- 2014-07-15 CN CN201420390223.9U patent/CN204013564U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404137A (en) * | 2015-12-04 | 2016-03-16 | 中国民航大学 | BD2/GPS-based high-precision synchronous time display and time service apparatus and operating method thereof |
| CN106154816A (en) * | 2016-07-14 | 2016-11-23 | 南京国电南自电网自动化有限公司 | A kind of punctual method of automaton high accuracy |
| CN106154816B (en) * | 2016-07-14 | 2019-04-16 | 南京国电南自电网自动化有限公司 | A kind of punctual method of automatic device high-precision |
| CN107229218A (en) * | 2017-06-20 | 2017-10-03 | 中通客车控股股份有限公司 | The multiple clock sources correction device and method of a kind of vehicle-mounted TBOX systems |
| CN114006673A (en) * | 2021-10-29 | 2022-02-01 | 上海宝冶集团有限公司 | Time service server, time service method and equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |