Time-frequency joint detection wave synthesis method and device and detection method

A technology of time-frequency combination and synthesis method, which can be used in electromagnetic wave detection and other directions, and can solve problems such as low resolution

Inactive Publication Date: 2020-10-20
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Detection using time-domain transmitted wave

Method used

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  • Time-frequency joint detection wave synthesis method and device and detection method
  • Time-frequency joint detection wave synthesis method and device and detection method
  • Time-frequency joint detection wave synthesis method and device and detection method

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no. 1 approach

[0030] figure 1 It is a flow chart of the method for synthesizing time-frequency joint sounding waves provided by the first embodiment of the present invention.

[0031] Such as figure 1 As shown, this embodiment provides a method for synthesizing time-frequency joint detection waves, including: S1: acquiring time-domain transmitted waves; S2: adding a pseudo-random sequence to the off-time of the time-domain transmitted waves to obtain time-domain Frequency joint detection wave; S3: Set the transmission parameters of the time-frequency joint detection wave based on the detection depth and resolution requirements.

[0032] In this embodiment, the time-frequency joint detection wave synthesized by the above method is used for detection, which can realize high-resolution detection of underground electrical information in the full depth range from shallow to deep, wherein the underground electrical information includes at least the resistivity of the underground medium.

[0033...

no. 2 approach

[0049] This embodiment provides a method for detecting underground electrical information, including: using the time-frequency joint emission wave provided in the first embodiment to detect underground electrical information.

no. 3 approach

[0051] This embodiment provides an apparatus for synthesizing time-frequency joint transmission waves, which is used for synthesizing the time-frequency joint transmission waves in the first embodiment.

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Abstract

The invention discloses a time-frequency joint detection wave synthesis method and device and an underground electrical information detection method. The time-frequency joint detection wave synthesismethod comprises the steps of obtaining a time-domain transmitted wave; adding a pseudo-random sequence into the turn-off time of the time domain transmitted wave to obtain a time-frequency joint detection wave; and setting emission parameters of the time-frequency joint detection wave based on the detection depth and resolution requirements. The time-frequency joint detection wave synthesized bythe method is used for detection, and high-resolution detection of underground electrical information in a full depth range from shallow to deep can be realized.

Description

technical field [0001] The invention relates to the field of underground detection, in particular to a method and device for combining time-frequency detection waves and a detection method. Background technique [0002] Aerial electromagnetic detection method The aeronautical electromagnetic detection method originated in the 1970s. This method uses a fixed-wing or helicopter platform to carry an electromagnetic transmitting and receiving system, which can realize mobile detection of underground electrical distribution information in the air. With the advantages of fast, efficient, low cost, and high resolution, it is widely used in the fields of mineral resource detection, groundwater resource detection, and underground space detection. The airborne electromagnetic method includes the use of time-domain transmitted waves for detection. Traditional time-domain transmitted waves include periodically set on-waveforms and off-times set after the on-waveforms. Using time-domain...

Claims

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Application Information

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IPC IPC(8): G01V3/12
CPCG01V3/12
Inventor 康利利王中兴底青云刘志尧张天信尹雄
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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