Device for reducing eddy current detection end effect of ferromagnetic tube rod

The device for reducing the eddy current detection end effect of the ferromagnetic tube rod is used for a magnetic saturation device (2) with a central channel (3) for eddy current detection of a strip-shaped metal tube rod (1), comprises a magnetizing coil (21), a guide sleeve (22) and a detection probe (23), and is characterized in that the guide sleeve (22) is of a hollow cylindrical structure made of a permeability magnetic material; the magnetizing coils (21) are arranged on the peripheries of the guide sleeves (22), the two magnetizing coils (21) and the two guide sleeves (22) form a group which is symmetrically arranged, and the middle detection probe (23) is arranged between the group of magnetizing coils (21) and the guide sleeves (22). Under the condition that the ampere turns of the magnetic saturation coil are not changed, the detected metal tube rod is magnetized and concentrated at the middle part closer to the detection probe, so that the dead zone of the end part which cannot be completely mag