Sensing device for observing soil resistivity based on high density electrical method

Abstract

The invention relates to a sensing device for observing soil resistivity based on a high density electrical method. The device comprises a resistivity sensor (1) sequentially connected, a sensor interface box (4) for data collection and transmission, and a multilevel circuit converter (6) for power supply and control; The resistivity sensor (1) comprises an insulated plastic tube (9). Periphery ofthe insulated plastic tube (9) is surrounded by four electrode rings (2) at equal intervals, each electrode ring (2) is led out through separate leads, and the four separate leads are insulated fromeach other into a four-core wire (3) and are connected to the sensor interface box (4). Compared with the prior art, the sensing device provided by the invention is small in size, easy to carry, and has little disturbance to the soil, and the measurement result is more accurate and reliable.

Description

technical field [0001] The invention relates to a soil resistivity sensing device, in particular to a soil resistivity sensing device based on high-density electrical observation. Background technique [0002] At present, electrical exploration is the most widely used method in the field of geophysical exploration. According to different working conditions, the main methods used include electrical profiling, electrical sounding, charging, and induced polarization. Each method has its corresponding measuring device. For the electrical profile method, the main research is the lateral electrical change of the geoelectrical section. Generally, the electrode distance is fixed and the electrode device is moved along the profile to observe within a certain depth range. The apparent resistivity varies along the profile. However, the measured resistivity is the average value of the entire measured pole length, which cannot accurately represent the resistivity value of a specified po...

AI Technical Summary

Problems solved by technology

However, while increasing the pole distance, the power supply must be increased

And the probe itself has a certain volume that will disturb the original soil

The traditional resistivity probe device requires more than 50 electrode rings, resulting in more than 50 wire cores, resulting in bulky wires

Therefore, there is still a lack of an effective, convenient and accurate measuring device for measuring the resistivity of a certain point in the geological body.

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