Early warning protection device and method for external force damage of buried cable in square construction area

The invention relates to the technical field of power grid power construction equipment, in particular to a square construction area buried cable external force damage early warning protection device and method.The device comprises a first advancing mechanism used for moving left and right, a second advancing mechanism used for moving front and back and a control device; the first travelling mechanism and the second travelling mechanism can respectively control the device to move left and right or front and back under the control of a lifting motor; a first magnetic field detection sensor and a second magnetic field detection sensor are installed below the first advancing mechanism and the second advancing mechanism respectively, magnetic field intensity values are periodically collected in the moving process of the device, automatic detection of the magnetic field intensity is achieved through movement of the device in a construction area, and then a buried cable distribution path curve is generated. The bur