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Rapid high-precision synchronization method for satellite time service

A high-precision synchronization and satellite timing technology, applied in the field of satellite timing, can solve the problems that the data cannot be displayed, the correlation is not determined, and the clock difference of the measurement results cannot be reflected.

Active Publication Date: 2019-12-20
FUJIAN NORMAL UNIV
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  • Abstract
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Problems solved by technology

In the whole system, the strict synchronization of the global time must be guaranteed. If the distributed devices in the system do not have a unified clock reference, the measurement results obtained will not be able to reflect the real situation due to clock differences, because each data cannot be reflected in which Obtained at all times, there will be no definite correlation between them, and finally these data will not be able to exert their due effect

Method used

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  • Rapid high-precision synchronization method for satellite time service
  • Rapid high-precision synchronization method for satellite time service
  • Rapid high-precision synchronization method for satellite time service

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Embodiment Construction

[0024] figure 1 Among them, 101 is a GPS / BD module, 102 is a microprocessor, 103 is a power supply module, the PPS pin and UART pin of 101 are connected with INT and UART pins of 102 respectively, and 103 is connected with 101 and 102 respectively.

[0025] In order to describe the present invention in more detail, below in conjunction with figure 2 , image 3 , Figure 4 with Figure 5 for further clarification.

[0026] Step 201: enter the timer 1 interrupt service routine, and execute step 202;

[0027] Step 202: Turn off timer 1 interrupt, execute step 203;

[0028] Step 203: Check C pps Whether it is less than 2, if yes then execute step 204, otherwise execute step 209;

[0029] Step 204: check and analyze the GPS receiving buffer, and then perform step 205;

[0030] Step 205: judge whether the message type is GPRMC, if yes then perform step 207, otherwise perform step 206;

[0031] Step 206: Determine whether the packet type is GPGGA, if so, execute step 207, o...

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Abstract

The invention relates to a rapid high-precision synchronization method for satellite time service, which is composed of a GPS / BD module, a microprocessor and a power supply module; the power supply module is respectively connected with the GPS / BD module and the microprocessor, and the microprocessor is connected with the GPS / BD module. When the timer 1 is interrupted, GPS data is analyzed, UTC time is obtained, and IsGPS _ Time is set; and when the INT interrupt service is entered, the read count value of the timer 0 and Tcount 0 are used for calculating the time length Tpps, and if corresponding conditions are met, the GPS UTC time is sent to a corresponding unit of the RTC, and meanwhile millisecond and microsecond of the RTC are reset. The method has the advantages that other auxiliaryequipment does not need to be added, time service operation is achieved per second, and the application effect of being rapid and high in precision is achieved.

Description

technical field [0001] The invention relates to the field of satellite timing, in particular to a fast and high-precision synchronization method for satellite timing. Background technique [0002] Time is one of the basic characteristics of the existence and movement of matter. It is one of the seven basic physical quantities of the International System of Units. An important guarantee for the smooth development of this activity. [0003] After humans entered the information society, the level of the Internet of Things promoted the application. More and more devices were distributed at various important nodes, and then gathered at the center to provide data basis for the industry's big data services. It seemed difficult to collect and use. Big data from distributed devices is now easily used to play a huge role, and these big data from distributed devices are gradually creating more value for human beings. In the whole system, the strict synchronization of the global time ...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0602
Inventor 吴允平林雅臻陈能成王廷银李良雄朗毅张国栋苏伟达
Owner FUJIAN NORMAL UNIV
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