High density cables for resistivity and wave velocity measurements
Product Description
By using high-density cables in conjunction with inclinometers and other equipment, the geological conditions of the strata can be measured. During the measurement process, high-density cables will obtain a large amount of underground physical parameter data, such as resistivity, wave velocity, etc.
Features Excellent transmission performance: low attenuation and low noise characteristics, which can ensure that the signal maintains high integrity and accuracy during long-distance transmission, and reduce signal distortion and interference.
High-density design: compact internal structure, tight and reasonable arrangement of wires, with the same cable outer diameter, can accommodate more wires or cores to meet a variety of signal transmission needs, such as simultaneous transmission of multiple measurement data signals such as vertex angle, azimuth angle, and power supply.
High reliability: high-quality insulation materials and protective layers are used, with good wear resistance, corrosion resistance, water resistance and aging resistance, which can adapt to complex and harsh field working environments, reduce the risk of cable damage, and extend service life.
Good flexibility: with a certain degree of flexibility, it is convenient to bend and move in the inclinometer tube or other small spaces, and is easy to operate and lay.
Technical parameters Conductor materials and specifications: High-purity copper or aluminum is usually used as the conductor material to ensure good conductivity. The conductor specifications are determined according to different usage requirements. There are many common wire diameters to choose from, such as 0.5mm², 0.75mm², 1.0mm², etc.
Insulation resistance: Generally, the insulation resistance is required to be several thousand megohms or even higher to ensure the stability and security of signal transmission and prevent signal leakage and interference.
Capacitance and inductance: It has suitable capacitance and inductance parameters to match the electrical characteristics of equipment such as inclinometers and reduce delays and distortions during signal transmission.
Withstand voltage level: It can usually withstand a certain high voltage, such as hundreds of volts or even thousands of volts, to meet the electrical safety requirements under different working conditions.
2D Inversion Software for Interpreting High-Density Cable Survey Data Data acquisition: High-density cables will obtain a large amount of underground physical parameter data during the measurement process, such as resistivity, wave velocity, etc. These data reflect the dielectric properties of different locations and depths underground, but cannot directly and intuitively present the underground structure.
Model building: The software will build an initial two-dimensional underground medium model based on the measurement data and known geological information. This model is usually a grid composed of areas with different resistivities or other physical parameters.
Forward simulation: Based on the established model, numerical simulation methods are used to calculate the measurement data that should be obtained theoretically under the model, that is, forward simulation. By continuously adjusting the parameters of the model, the error between the forward simulation results and the actual measurement data is minimized.
Iterative inversion: Iterative algorithms, such as the least squares method and the conjugate gradient method, are used to continuously modify the model parameters and repeat the forward simulation process until the difference between the simulation results and the actual measurement data meets certain accuracy requirements. At this time, the model obtained is the inversion result, which reflects the two-dimensional distribution of the underground medium.
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