Magnetic resonance coil system for remote advanced detection in narrow space and detection method

Abstract

The invention relates to the field of nuclear magnetic resonance water detection, and particularly relates to a magnetic resonance coil for remote advanced detection in a narrow space and a detectionmethod. The magnetic resonance coil comprises an upper computer, a main control unit, a magnetic resonance transmitter, a magnetic resonance receiver, a plurality of coils and a plurality of program-controlled switches. The upper computer is connected with the magnetic resonance transmitter through the main control unit and sends instructions to the magnetic resonance transmitter and the magneticresonance receiver through the main control unit; the main control unit sends instructions to the magnetic resonance transmitter and the magnetic resonance receiver according to the instructions of the upper computer and is used for controlling the plurality of program-controlled switches; the plurality of coils are connected in pairs through two program-controlled switches, and the coils form a series structure or a parallel structure by controlling the opening and closing of the program-controlled switches. Compared with the original single multi-turn transmitting / receiving coil, the magnetic resonance coil for remote advanced detection in a narrow space and the detection method increases the equivalent area of the transmitting / receiving coil, and under the same transmitting power, the emission current can be correspondingly increased (the formula is shown in the description) times, and the hydrogen protons at a longer distance can be excited.

Description

technical field [0001] The invention relates to the field of nuclear magnetic resonance water detection, in particular to a magnetic resonance coil and a detection method for long-distance advanced detection in a narrow space. Background technique [0002] In underground engineering, especially in large-scale underground excavation projects such as mines and tunnels, due to the complexity and unknownness of geological conditions, disasters such as water inrush, empty water, and water gushing caused by groundwater often occur, which poses a threat to construction safety. Huge disaster and incalculable loss. Therefore, in underground engineering, it is of great significance to accurately, quickly and effectively detect the water body in front of the construction in advance. The magnetic resonance method has been proven to be effective in narrow spaces, including mines and tunnels, for advanced detection of water bodies ahead. The commonly used coil system is a set of transmit...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a magnetic resonance coil system and detection method for long-distance advanced detection in a narrow space, which cannot meet the needs of long-distance advanced detection

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