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High-precision distributed synchronous clock system and method

A synchronous clock and distributed technology, applied in the field of micro-motion survey, can solve the problems of long pre-synchronization time, lower survey accuracy, and inability to survey, etc., and achieve high synchronous clock accuracy, clear spatial orientation, and long effective time.

Inactive Publication Date: 2014-10-29
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

These three synchronization methods have their own disadvantages, such as the difficulty of long-distance synchronization with wired synchronization; wireless communication synchronization is easily affected by environmental factors; high-precision quartz clocks are expensive and take a long time to pre-synchronize. These disadvantages will greatly reduce the accuracy of the survey. , even lead to undetectable consequences

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  • High-precision distributed synchronous clock system and method
  • High-precision distributed synchronous clock system and method
  • High-precision distributed synchronous clock system and method

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Embodiment Construction

[0026] A high-precision distributed synchronous clock system, such as figure 2 As shown, it is mainly composed of GPS receiver module, stability judgment module, constant temperature crystal oscillator module, frequency multiplier module, frequency divider module, time interval measurement module, digital-to-analog conversion conditioning module and liquid crystal display. The positioning information output terminal of the GPS receiver module is connected to the liquid crystal display, and the positioning information obtained by solving can assist the layout of the observers, so that each observer can be equidistantly distributed on the circumference. The time information output terminal of the GPS receiver module is connected to the observer, and the time information collected by the observer can be time-stamped through the calculated time information. The 1PPS signal output end of the GPS receiver module is connected with an input end of the time interval measurement module...

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Abstract

The invention discloses a high-precision distributed synchronous clock system and method. A distributed synchronization method combining GPS (global positioning system) with a constant-temperature crystal oscillator is adopted, that is, a GPS receiver module resolves time information and positioning information and generates 1PPS (pulse per second) signals to rectify local 1PPS signals generated by a constant-temperature crystal oscillator module, so that the local 1PPS signals and the 1PPS signals are synchronous. Thus, a viewer with the high-precision distributed synchronous clock system is capable of realizing multipoint distributed synchronization, high in synchronization accuracy and capable of accurately recording time during synchronous acquisition of data. Furthermore, spatial dimension of data acquiring points can be accurately positioned. After one or more GPSs fail, pulse per second generated by the local constant-temperature crystal oscillator is used for synchronization instead of the 1PPS signals, and effective time of synchronization can reach more than half an hour.

Description

technical field [0001] The invention relates to the technical field of micro-motion survey, in particular to a high-precision distributed synchronous clock system and method. Background technique [0002] Weak vibrations not caused by earthquakes exist on the surface of the earth all the time, which are called fretting. Studies have shown that the structure of the shallow crustal medium is reflected in the micro-motion observation, and the micro-vibration of the geological medium can be studied to infer the structure of the stratum and form a micro-motion survey method. The micro-motion survey method uses the micro-motion observer to collect incoming waves from various directions on the surface, extracts the dispersion curve through the spatial autocorrelation (SPAC) method, and obtains the S-wave velocity structure through inversion. When the Rayleigh wave dispersion curve is extracted from the micro-motion signal by the SPAC method, not only the observation array is requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R20/02G04G3/00G04G7/00
Inventor 王国富陈巍叶金才张法全周波韦秦明庞成
Owner GUILIN UNIV OF ELECTRONIC TECH
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