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Driving method and device for three-dimensional scanning nuclear magnetic resonance imager array antenna

A technology of nuclear magnetic resonance imaging and array antennas, which is applied in the fields of electron magnetic resonance/nuclear magnetic resonance detection, measurement devices, and material analysis through resonance. Problems such as the three-dimensional scanning driving device of the logging tool, to achieve the effect of convenient and quick power feeding and improving the circumferential resolution ability

Active Publication Date: 2018-07-10
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

Therefore, the nuclear magnetic resonance logging tool in the prior art can only perform signal detection in the radial depth dimension and axial depth dimension, and does not have the signal detection capability of the circumferential multi-directional sensitive area. Driving device for three-dimensional scanning of resonance logging tool

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  • Driving method and device for three-dimensional scanning nuclear magnetic resonance imager array antenna
  • Driving method and device for three-dimensional scanning nuclear magnetic resonance imager array antenna
  • Driving method and device for three-dimensional scanning nuclear magnetic resonance imager array antenna

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Embodiment Construction

[0048] 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.

[0049] figure 1It is a structural diagram of an array antenna driving device for a three-dimensional scanning nuclear magnetic resonance imaging apparatus provided by an embodiment of the present invention. One aspect of the present invention is to provide a 3D scanning MRI array antenna driving device 100, including: a bus interface module 110, a pulse timing processing module 120, a multi-channel high-power pulse transmitting module 130 and an antenna switch...

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Abstract

The invention provides a driving method and device for a three-dimensional scanning nuclear magnetic resonance imager array antenna. The driving method includes the following steps that: a control command sent by a control system is received; the control command is analyzed, so that pulse transmission time sequence signals and antenna switching control signals are generated; high-voltage signals inputted from the outside are processed according to the pulse transmission time sequence signals, a plurality of channels of high-voltage radio-frequency pulses are outputted; and at least one channelof high-voltage radio-frequency pulses and antennas to work in the nuclear magnetic resonance pulse array antenna are selected according to the antenna switching control signals, and the selected high-voltage radio-frequency pulses are superimposed to drive each of the antennas to work to emit nuclear magnetic pulse signals. According to the device of the invention, one antenna can be separatelyexcited to detect single-azimuth strata information, a plurality of antennas can be excited to detect multi-azimuth strata information, and therefore, multi-layer slice information detection of regional signals in different azimuths around can be realized, the circumferential resolving capability of a nuclear magnetic resonance logger probe can be improved, and strata detection at a three-dimensional scale can be realized.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance logging, in particular to a method and device for driving an array antenna of a three-dimensional scanning nuclear magnetic resonance imager. Background technique [0002] The phenomenon of nuclear magnetic resonance (Nuclear Magnetic Resonance, NMR) was discovered in 1946, and it was soon applied in the fields of physics, chemistry, material science, life science and medicine. In the 1950s, NMR began to be applied in the oil and gas industry, initially in the field of reservoir rock physics. The nuclear magnetic resonance logging tool can use the principle of nuclear magnetic resonance to detect the formation information around the borehole, and has unique qualitative identification and quantitative evaluation capabilities of reservoir fluid. [0003] The probe is one of the important parts of the NMR logging tool. The structure of the probe determines the key performances suc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/32E21B47/00E21B49/00
CPCE21B47/00E21B49/00G01V3/32G01N24/081G01R33/3415G01R33/3664G01R33/34092G01R33/3607G01R33/3621G01R33/3628
Inventor 肖立志廖广志刘伟魏遥许洋洋
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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