Synchronous acquisition method for seismic exploration based on GPS and 5G dual-channel high-precision timing
A seismic exploration and synchronous acquisition technology, applied in the field of seismic exploration, can solve problems such as inability to complete time service, and achieve the effects of increased stability, improved synchronization accuracy, and low power consumption control
Active Publication Date: 2022-04-01
NANJING UNIV OF POSTS & TELECOMM
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[0004] The publication number in the prior art is: CN111610557A, and the name is: a 5G communication-based oil exploration detection device and its method, which uses a GPS timing scheme to transmit data through 5G. There is only one timing scheme, which cannot be used when the GPS signal is weak. complete timing
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[0053] In order to illustrate the technical solution of the present invention more clearly, the technical solution of the present invention is described in further detail below in conjunction with the accompanying drawings:
[0054] Such as figure 1 As shown, the present invention is a seismic exploration synchronous acquisition method based on GPS and 5G dual-channel high-precision timing, and the specific steps are as follows:
[0055] Step 1, the collection station system initialization;
[0056] Step 2, judging whether the satellite signal detected by the collection station meets the GPS timing requirements, if so, turn on the GPS timing, and if not, turn on the 5G timing;
[0057] Step 3, tame the constant temperature crystal oscillator to output synchronous sampling clock;
[0058] Step 4, collect data and save the data.
[0059] After the GPS is powered on, the returned visual satellite status information includes the signal-to-noiseratio (SNR). According to the defi...
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The invention discloses a seismic exploration synchronous acquisition method based on GPS and 5G dual-channel high-precision timing. The method utilizes traditional GPS timing and 5G high-precision timing channels, and combines FPGA phase-locked loop tame clock technology to generate stable high-precision Synchronize the acquisition clock. When the exploration node instrument works in a scene where the GPS signal is weak and cannot provide accurate GPS timing signals, the system automatically switches to 5G timing through an algorithm, which increases the stability of the system in complex environments. Compared with the existing synchronization mechanism of seismic exploration network, this method can effectively improve the synchronization accuracy and stability in complex environments, and can further reduce system power consumption.
Description
technical field [0001] The invention relates to the field of seismic exploration, in particular to a seismic exploration synchronous acquisition method based on GPS and 5G dual-channel high-precision timing. Background technique [0002] Nowadays, the front-end acquisition nodes of large-scale seismic exploration networks are composed of tens of thousands of seismometers arranged in a distributed manner. The acquisition nodes are required to sample the same excitation source at the same time, otherwise the inversion results will be affected, so the seismic acquisition instrument can realize High-precision, synchronous acquisition is particularly important. In order to adapt to the characteristics of field work, especially in more complex regional environments, the instrument is not easy to carry, so low power consumption design has become another key issue in system design. [0003] The mainstream seismic survey nodes are arranged in a distributed manner. Clock synchronizat...
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IPC IPC(8): G01V1/00G04R20/02
CPCG01V1/003G04R20/02
Inventor 郝学元徐星亮张诚超朱震华
Owner NANJING UNIV OF POSTS & TELECOMM