Self-adaptive magnetic flux leakage detection device and method for bent part of pipeline

The invention relates to the field of pipeline magnetic flux leakage detection, and discloses a self-adaptive magnetic flux leakage detection device and method for a bent part of a pipeline, and the device comprises a power section, a battery section, a calculation section and a magnetic flux leakage section which are sequentially connected through a universal joint. According to the invention, parallel acquisition and synchronous high-speed processing are carried out on multi-path sensor data based on an on-chip processing technology; through a multi-sensor data fusion motion state estimation algorithm, the motion state of a magnetic flux leakage joint is estimated in real time in the bend entering process of the magnetic flux leakage detection device, and the bend entering and exiting position is pre-positioned, so that the intensity of an excitation magnetic field is adaptively switched at the bent and linear parts of a pipeline. By means of the mode, the stability of movement of the magnetic flux leakage