Vibroseis-based method for rapidly positioning trigger time mark of cable-free seismic detector

Abstract

The invention relates to a vibroseis-based method for rapidly positioning a trigger time mark of a cable-free seismic detector. The vibroseis is formed by respectively connecting a scanning signal controller of a control box with a trigger time mark recorder and a power amplifier, wherein the trigger time mark recorder is connected with a radio station and the power amplifier is connected with anexcitation body. The rapid positioning method comprises three processes of data triggering, receiving and recovering and concretely comprises the steps of receiving vibroseis information via the radio station by utilizing a main engine, storing the analyzed trigger time mark and the scanning time length into an electronic class report, when recovering data, rapidly positioning to an initial sampling point of effective seismic data according to the trigger time mark in the electronic class report, and intercepting and recovering the effective data according to the scanning time length. In the invention, the trigger time mark is calculated according to GPS (Global Position System) information and synchronous trigger signals; and when recovering, the initial sampling point of the effective seismic data are rapidly and accurately positioned and the effective time length is intercepted; and therefore, a mass of data transmission time and data storage space are saved and a mass of human andmaterial resources are saved through an automatic processing mode.

Description

Technical field: [0001] The invention relates to a cable-free seismograph in geophysical exploration, in particular to a method for quickly locating effective seismic data in the cable-free seismograph based on GPS and synchronous trigger signals in cooperation with a vibrator. Background technique: [0002] There are two main types of digital seismometers commonly used in geophysical exploration: cabled telemetry seismographs and cableless storage seismographs. Cable telemetry seismographs play a dominant role in practical field applications. Its main feature is that commands and data are transmitted entirely by cable systems. Internationally well-known seismograph manufacturers and R&D companies have launched more representative products. In recent years, with the development of seismic exploration from traditional two-dimensional, small-scale methods to three-dimensional, high-resolution, and large-scale methods, the precision requirements for seismic exploration are gett...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the above-mentioned cableless seismic data redundancy is too large, which seriously affects the data transmission and processing efficiency, and to provide a method of applying GPS and synchronous trigger signals to the trigger time scale of the cableless seismograph based on the vibrator. Quick positioning method

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