Cable Route and Cable Identification

Electromagnetic waves are generated by a transmitter and delivered to the underground cable under test through different transmission connection methods. After the underground cable senses the electromagnetic waves, induced current is generated on the cable surface and propagates along the cable. During propagation, the cable also radiates electromagnetic waves back to the ground. When the receiver detects from the ground, it receives the electromagnetic wave signal above the cable, and the strength changes of the received signal are used to determine the position and route of the underground cable. Common cable route tracing and identification methods include direct connection, coupling, and induction.