Pipe inner diameter detection device and method

The invention relates to the technical field of pipeline detection, in particular to a pipe inner diameter detection device and method. The pipe inner diameter detection device comprises a driving assembly and a measuring assembly, the driving assembly comprises a power source, a lead screw, a guide rod, a moving block, an eccentric part, an eccentric supporting rod and an eccentric rod, the guide rod is sleeved with the moving block, and the eccentric part is connected to the eccentric supporting rod and drives the eccentric rod to rotate around the eccentric supporting rod; the measuring assembly comprises a fixed plate and a plurality of displacement measuring units connected to the fixed plate, the fixed plate is rotatably connected with the moving block, and the displacement measuring units are used for detecting the distance between the displacement measuring units and the inner wall of the pipeline. The device for detecting the inner diameter of the pipe is simple in structure, elements driven by elect