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High-precision satellite pulse per second synchronous punctuality device and method

A pulse-per-second, high-precision technology, which is applied in the field of high-precision satellite pulse-per-second synchronous timing devices, can solve the problems of output 1PPS signal jitter and the inability to effectively remove satellite 1PPS signal jumps, etc., and achieve the elimination of cumulative errors and satellite 1PPS signals jump effect

Active Publication Date: 2020-05-29
SHENZHEN FORWARD IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the high-precision satellite second pulse synchronous timekeeping device and method provided by the present invention solve the problem that the satellite 1PPS signal jump cannot be effectively removed in the existing time synchronization device, and when the satellite loses connection and is disconnected, it causes Output 1PPS signal jitter problem

Method used

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  • High-precision satellite pulse per second synchronous punctuality device and method
  • High-precision satellite pulse per second synchronous punctuality device and method
  • High-precision satellite pulse per second synchronous punctuality device and method

Examples

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Embodiment 1

[0051] like figure 1 Shown, a kind of high-precision satellite second pulse synchronous time keeping device, comprises clock source, satellite receiver, synchronous module, output device and CPU;

[0052] The output terminal of the satellite receiver is respectively connected with the input terminal of the clock source and the first input terminal of the synchronization module, the output terminal of the clock source is connected with the second input terminal of the synchronization module, and the output terminal of the synchronization module is connected with the input terminal of the output device ;

[0053] The synchronization module communicates with the CPU.

[0054] The clock source in this embodiment is a high-precision tameable rubidium atomic clock, and the satellite 1PPS signal output by the satellite receiver will tame the rubidium atomic clock, so that its output clock is synchronized with the satellite 1PPS signal, and its output clock will be used as the clock ...

Embodiment 2

[0063] like figure 2 Shown, a kind of high-precision satellite second pulse synchronous time-keeping method comprises the following steps:

[0064] S1. Receive the satellite signal through the satellite receiver, and output the satellite 1PPS signal to the synchronization module and rubidium atomic clock;

[0065] Among them, the satellite 1PPS signal input to the rubidium atomic clock will tame the rubidium atomic clock, so that the output clock signal is synchronized with the satellite 1PPS signal;

[0066] S2, the rubidium atomic clock is multiplied into a 125Mhz clock signal by using the PLL core, and input into the synchronization module as its internal clock;

[0067] S3. In the synchronization module, when the rising edge of the satellite 1PPS signal is detected, the 1PPS signal is pulled high, and the internal high-precision punctual counter counts at the same time;

[0068] S4. Detect the phase difference signal between the input 1PPS signal and the output 1PPS sig...

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Abstract

The invention discloses a high-precision satellite pulse per second synchronous punctuality device and method. The method is characterized in that phase difference detection of 1PPS signals is realized by using flip phase discrimination in the process of realizing synchronous punctuality, and the output phase of 1PPS is accurately controlled in real time by combining stepping compensation and phase shift alignment so that an accumulated error of a local clock and hopping of satellite 1PPS signals are well eliminated, high-precision synchronous punctuality is realized, during satellite synchronization, synchronization precision of 1PPS output is superior to 16ns; when a satellite is disconnected, the local punctuality is 24 hours, the error is less than 3 microseconds, moreover, online configuration of the output 1PPS pulse width is supported.

Description

technical field [0001] The invention belongs to the technical field of digital communication, and in particular relates to a high-precision satellite second pulse synchronization time keeping device and method. Background technique [0002] In the time equipment that requires high precision, the second pulse of the satellite and the NMEA0183 protocol data packet are generally used for time synchronization, and the processing system converts the synchronization information into the time of various user equipment in the form of 1PPS+TOD or B (DC) code Synchronization, so the synchronization problem of 1PPS is involved here. At present, many technologies directly output the satellite 1PPS when the satellite is connected, and use the local clock for punctual processing when the satellite is disconnected. However, this technology has certain limitations and cannot effectively remove the jump of 1PPS. When the satellite loses connection, the output 1PPS will jitter. Contents of...

Claims

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Application Information

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IPC IPC(8): G04R20/04G04F5/14
CPCG04F5/14G04R20/04
Inventor 罗仁昌袁结全崔志辉
Owner SHENZHEN FORWARD IND CO LTD
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