Pole tower grounding resistance measuring system based on multi-frequency scanning principle

The invention discloses a pole tower grounding resistance measuring system based on the multi-frequency scanning principle and belongs to the technical field of pole tower grounding resistance measurement. According to the technical scheme adopted for solving the technical problems, the pole tower grounding resistance measuring system based on the multi-frequency scanning principle comprises a central controller, the signal output end of the central controller is connected with a signal excitation module, the signal excitation module is connected with a pole tower grounding body through a poletower grounding lead, and the signal output end of the pole tower grounding body is connected with a signal collection module; the signal collection module is in series connection with a signal amplification circuit, a filter circuit and an alternating current/direct current conversion circuit sequentially and then is connected with the central controller; and the central controller is further connected with a touch scre