Power cable metal shielding layer corrosion defect detection device and method

The invention provides a power cable metal shielding layer corrosion defect detection device. The device comprises a traveling wave transmitting module, a double-line balance module for accessing a tested cable, a traveling wave coupling module, a traveling wave sampling storage module, a traveling wave processing module, a control module and a human-computer interface, wherein the traveling wavetransmitting module, the double-line balance module, the traveling wave coupling module, the traveling wave sampling storage module, the traveling wave processing module and the human-computer interface are sequentially connected, and the traveling wave transmitting module and the traveling wave sampling storage module are connected with the control module. The invention further provides a methodfor detecting a corrosion defect of a metal shielding layer of a power cable. In the invention, the corrosion defect point of the metal shielding layer of the power cable can be accurately positioned,and the problem of corrosi