Transient electromagnetic measurement device and measurement method

Abstract

The invention relates to the technical field of transient electromagnetic measurement, in particular to a transient electromagnetic measuring device and method.The device comprises a transient electromagnetic measuring instrument, a transmitting coil and a receiving coil, and the transmitting coil and the receiving coil are each provided with four fixing piles in a matched mode; the fixing pile comprises a buoyancy supporting part, a columnar shell and a needle head part which are sequentially arranged from top to bottom. The buoyancy supporting part comprises a supporting block, a connecting rod and a floating barrel which are sequentially and vertically connected from top to bottom; a cavity is formed in the columnar shell and is filled with liquid; the floating barrel is arranged in the cavity and floats on the liquid, and the connecting rod penetrates through the upper surface of the columnar shell; a water outlet communicated with the cavity is formed in the outer side face of the columnar shell, a valve is arranged at the water outlet, and the water outlet is communicated with the water outlet of the adjacent fixing pile through a water pipe. According to the invention, the problem that the receiving coil and the transmitting wireframe are difficult to be in the same horizontal plane during installation when the side lengths of the receiving coil and the transmitting wireframe are too long is solved.

Description

technical field [0001] The invention relates to the technical field of transient electromagnetic measurement, in particular to a transient electromagnetic measurement device and a measurement method. Background technique [0002] Transient Electromagnetic Method (TEM) is one of the main means of geophysical detection. It stimulates the underground target by emitting electromagnetic waves into the ground and receives the secondary field generated by it to determine the physical parameters of the measured target. The transient electromagnetic method measurement device is composed of two parts: the transmitting loop and the receiving loop. The working process is divided into three parts: transmitting, electromagnetic induction and receiving. When a step current is applied to the launch loop, the launch current suddenly drops from zero to zero. According to the electromagnetic induction theory, the sudden change of the current in the launch loop will generate a magnetic field ar...

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Problems solved by technology

[0005] One of the objectives of the present invention is to provide a transient electromagnetic measuring device, which solves the problem that when the side lengths of the receiving coil and the transmitting coil are too long, it is difficult to install the receiving coil and the transmitting wire frame at the same level, and it takes a lot of time to Adjusting the settings makes the measurement more cumbersome, which may cause inaccurate results of data detection, which greatly affects the work efficiency and measurement accuracy.

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