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Phase-control controllable seismic focus system

A technology of seismic sources and seismic source substations, applied in the field of non-explosive seismic sources, can solve problems such as unfavorable shallow high-resolution seismic exploration, inability to realize directional exploration, difficulty in generating complex waveforms, etc., to overcome storage depth constraints and improve energy utilization , the effect of long scanning time

Inactive Publication Date: 2006-01-18
JILIN UNIV
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Problems solved by technology

CN1643891 discloses the "electromagnetic high-power shallow seismic vibroseis system", which has a scanning frequency range of 5-1400HZ and an output force of 1000N. Its scanning waveform is restricted by the depth of waveform storage, and it is difficult to generate complex waveforms, which is not conducive to shallow High Resolution Seismic Surveying
Moreover, the seismic waves generated by all existing seismic sources propagate underground in half-space, and only a small part of them are actually received and reflected by geological bodies, which can neither realize directional exploration nor cause a waste of energy
This is also the common defect of existing various seismic sources

Method used

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and embodiment for further explanation:

[0018] The main control unit 1 is connected to and controls more than one or even N vibroseis sub-stations 2 via a communication cable, and terminal matching resistors 3 are provided at both ends of the communication cable;

[0019] The main control unit 1 includes a liquid crystal module 4, a keyboard module 5, a parameter access 6 and a communication module 7. The liquid crystal module 4 and the keyboard module 5 realize human-computer interaction and text display through the single-chip microcomputer 8, and the single-chip microcomputer 8 passes P0[0..7] Connect with DS[0..7] of LCD module 4, connect chip selection CS with P2.0, connect data / address selection command RO with P2.1; P2[0..7] of 8 is used as the row and column scanning line, the two I / O ports of the single-chip microcomputer 8 are connected to the parameter access 6, the serial port is connected to the communication...

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Abstract

The invention discloses a phase controlled epicenter system, which uses a primary control unit to control at least one controllable epicenter substations. The primary control unit realizes human-computer interaction with liquid crystal screen, keyboard, realizes access through E2PROM, and realizes the principal and subordinate computers interaction through communication model. The controllable epicenter substation is made up of control model, signal generating model, power amplifying model and communication model, the communication model receives the information, controls the DDS to generate scanning waveform, which is transmitted into the power amplifier to be driven after being filtered, and the vibrator generates vibration and sends underground. When the controllable epicenter substation receives the scanning order of the primary control unit, it overlaps each quake wave in the shape phase in the fixed region underground through controlling the phase of the scanning signal, the other region is counteracted, and thus it realizes beam orientation.

Description

Technical field: [0001] The invention relates to a non-explosive seismic source for shallow seismic exploration, especially a vibrator. Background technique: [0002] Existing non-explosive seismic exploration sources include hydraulic vehicle-mounted vibrator and electromagnetic-driven vibrator. In the field of oil and gas exploration, the hydraulic vehicle-mounted vibrator is generally used, and its signal frequency range is 6-500HZ, and the maximum output force is tens of KN. However, due to the narrow scanning frequency band, large size and cumbersome field work, the system is not suitable for shallow high-resolution seismic exploration. The electromagnetically driven vibrator is a portable vibrator designed for shallow high-resolution seismic exploration. The existing product is the "vibrator" produced by Japan's OYO company with a limited output force of only 500N. CN1643891 discloses the "electromagnetic high-power shallow seismic vibroseis system", which has a sca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/02
Inventor 林君陈祖宾陈鹏程姜弢张林行李晓旭
Owner JILIN UNIV
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