Power transmission line strain clamp state detection device and method

The invention discloses a state detection device and method for a strain clamp of a power transmission line. The device comprises a first clamp, a second clamp, a third clamp and a fourth clamp, wherein the first wire clamp and the fourth wire clamp are clamp-shaped test clamps and are used for clamping a conductor, and the second wire clamp and the third wire clamp are flat-plate-shaped test clamps and are used for clamping a strain clamp; the conductor between the first wire clamp and the second wire clamp and the strain clamp form a first measuring section, the strain clamp between the second wire clamp and the third wire clamp forms a second measuring section, and the conductor between the third wire clamp and the fourth wire clamp and the strain clamp form a third measuring section. According to the invention, abnormal conductivity at the lap joint due to factors such as poor installation technology and surface oxidation can be found in the power failure lap joint process or in a certain stage following