Performance Analysis of Long Distance Transmitting of Magnetic Signal on Cylindrical Steel Rod

The magnetic signal transmission (MST) method is a transmission system in which magnetic flux is distributed over a boring rod (cylindrical steel rod). The boring rod is provided with a transmitting coil and receiving coil. At the tip of the boring rod, a sensor is provided to obtain information from underground. The output signal of the sensor becomes the input of the transmitting coil. Magnetic flux is generated by the current in the transmitting coil. The sensor signal is transmitted to the receiving coil by electromagnetic induction. MST is being developed for long distance transmission. In this paper we describe experiments to assess the performance of MST.