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Clock synchronization device and method of submarine geophysical exploration instrument

A technology for geophysical exploration and clock synchronization, which is applied in geophysical measurement, instrumentation, multiplexing communication, etc., and can solve the problems of smaller frequency variable amplitude of quartz crystal oscillators, difficulty in temperature compensation, and increased power consumption, etc. Achieve the effect of increasing hardware circuit and cost, reducing power consumption and cost, and high precision

Inactive Publication Date: 2017-05-31
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

If the crystal oscillator with temperature compensation is to be miniaturized, the frequency variable range of the quartz crystal oscillator will be reduced, and temperature compensation will be more difficult. Additional circuit increases

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  • Clock synchronization device and method of submarine geophysical exploration instrument
  • Clock synchronization device and method of submarine geophysical exploration instrument
  • Clock synchronization device and method of submarine geophysical exploration instrument

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In addition, the protection scope of the present invention should not be limited only to the following specific structures or components or specific parameters.

[0029] The present invention provides a clock synchronization device for an instrument for seabed geophysical exploration, mainly comprising a GPS module ①, an atomic clock ②, a single-chip microcomputer ③, a power amplifier circuit ④, a matching circuit ⑤ and an underwater acoustic transducer ⑥, wherei...

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Abstract

The invention relates to a clock synchronization device and method of a submarine geophysical exploration instrument, mainly applied to the clock synchronization of submarine detection instruments. Only one underwater acoustic emission device is needed to synchronize all submarine detection instruments with underwater acoustic devices within an underwater acoustic communication range; underwater acoustic signals are sent for multiple times after certain time intervals by an acoustic emission instrument with an atomic clock, the submarine detection instruments open receiving devices at specified times and stores received data; after the submarine detection instruments are recycled, the acceptation times of the underwater acoustic signals sent for multiple times and collected by the submarine detection instruments are accurately calculated by an upper computer to obtain time deviations in the instruments, and the data of the instruments are collected so as to realize the high-precision clock synchronization collection purpose.

Description

technical field [0001] The invention belongs to the technical field of marine exploration, and in particular relates to a clock synchronization device and method for an instrument used in seabed geophysical exploration, which is suitable for a method for realizing clock synchronization by utilizing underwater acoustic communication. Background technique [0002] In the marine operations of submarine seismic and electromagnetic detection, multiple instruments are placed at different points along the survey line along the surface, and each instrument works independently on the seabed according to the set program. For seabed measurement, the time synchronization system is the key to seabed data recording by seabed detection instruments, and the accuracy of data collection depends entirely on the accuracy of the time synchronization system. The huge seawater layer has shielded the GPS signal, and the instruments placed on the seabed cannot receive the GPS information sent by the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06G01V11/00
CPCG01V11/002H04J3/0638H04J3/0644Y02A90/30
Inventor 简逸芸赵剑阳游庆瑜许晴张妍黄松徐锡强
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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