A hunting appearance for secondary cable

The utility model provides a hunting appearance for secondary cable, the both ends of secondary cable are initial end respectively and look for the end, initial end's shielding layer is equipped withfirst earth connection, the shielding layer of looking for the end is equipped with the second earth connection, the hunting appearance is including being used for sending alternating current signal'ssignal generating device and current measuring device, signal generating device connects on first earth connection, current measuring device is equipped with two and just connects respectively on first earth connection and second earth connection, according to faraday law of electromagnetic induction, the earth connection at same root secondary cable both ends passes through earth mat interconnected, if apply the alternating current source on the earth connection of one side, opposite side earth connection department also has the basic electric current that equals of size, consequently, if the electric current size th