Investigation of autonomous ground current field injection signal characteristics

Autonomous injection of signals to generate ground current field technology is used to realize signal transmission by injecting signals into the ground to form a ground current field. In this paper, horizontal double electrodes are used to inject the signal into the ground, and the model of the ground equivalent electrical network is established according to the circuit characteristics, and the signal transmission characteristics are simulated and analyzed. In order to verify the penetration ability of different signals, square wave, sine wave and triangle wave are injected into the ground, and the signals are received at 13m and 18m and processed and analyzed. The results show that the square wave has the best penetration, followed by the sine wave and finally the triangle wave, which is consistent with the simulation results and verifies the accuracy of the model and the signal penetration ability in the medium.