Non-destructive inspection device for pressure containers using leakage-flux measurement

A non-destructive inspection device for detecting defects of a pressure container using magnetic flux leakage, the non-destructive inspection device comprising:

• a pressure container configured to rotate about a rotating axis;
• a coil winding mount disposed outside of the pressure container to magnetize the pressure container and generate a first magnetic flux, the coil winding mount being disposed at one side of the pressure container with respect to the rotating axis;
• a sensor support disposed outside of the pressure container, the sensor support being disposed at the other side of the pressure container with respect to the rotating axis, the sensor support having a plurality of first magnetic field sensing sensors arranged along the rotating axis;
• a yoke magnetizing the pressure container to generate a second magnetic flux in a direction vertical to the first magnetic flux, the yoke being disposed in a direction vertical to the rotating axis, having a second magnetic field sensing sensor and configured to move along the rotating axis;
• and
• an endoscope attached with a magnetic field sensing sensor is inserted into the pressure container to measure the defect located on the inner surface of the pressure container,
• wherein, while the pressure container rotates, at least one of the first magnetic field sensing sensors measures magnetic flux leakage caused by a first defect present in the pressure container thereby detecting the defect,
• the endoscope moves at one pitch interval to measure the defect located on the inner surface of the pressure container, and
• the yoke moves at one pitch interval to detect a defect on an outer surface of the pressure container.