MEMS (Micro Electro Mechanical System) inertial measurement unit-based pipeline surveying and mapping and defect positioning device and pipeline surveying and mapping and defect positioning method thereof

The invention belongs to the technical field of pipeline surveying and mapping, and in particular relates to an MEMS (Micro Electro Mechanical System) inertial measurement unit-based pipeline surveying and mapping and defect positioning device and a pipeline surveying and mapping and defect positioning method thereof. The MEMS inertial measurement unit-based pipeline surveying and mapping and defect positioning device comprises a measurement unit, a correction unit, a defect detection unit, a power supply unit and a data processing and memory unit. Compared with the conventional inventions and papers and the like, the MEMS inertial measurement unit is lower in cost, and has a wider pipe diameter application range of being 60 mm at minimum besides the autonomy. The MEMS inertial measurement unit is combined with an odometer, a flux-gate magnetometer and an ultrasonic detection device. The pipeline surveying and mapping problem without laying a fixed-point magnetic scale is solved, meanwhile, the information on a defect position is detected and marked, and convenience is provided for the maintenance and strengthening of pipeline defects. An odometer wheel is also connected with a power generation device, so that the problems caused by external power supply are solved.