Information processing system for nondestructive inspection and nondestructive inspection method

An information processing system for nondestructive inspection of a measurement target that is a magnetic material covered by a nonmagnetic body, the information processing system comprising:

• a sensor unit including a casing with a measurement surface, a sensor array with one or more magnetic sensors, and a sensor scan mechanism driven by a motor;
• and
• an information processing device that reduces noise magnetic field components other than magnetic field components coming from the measurement target and/or emphasizes the magnetic field components coming from the measurement target in actual measurement data, which includes reducing the noise magnetic field components in the actual measurement data coming from a magnetic material other than the measurement target, based on the actual measurement data and virtual measurement data, wherein
• the actual measurement data is obtained by applying a magnetic field to the measurement target and actually measuring the magnetic field coming from the measurement target using the one or more magnetic sensors at a measurement position on a surface of the nonmagnetic body, the one or more magnetic sensors including at least one main sensor and at least one reference sensor corresponding, respectively, to the at least one main sensor, the at least one reference sensor being disposed further away from the measurement surface than the corresponding at least one main sensor,
• the virtual measurement data is created by performing a simulation under virtual conditions that are obtained by modifying actual measurement conditions, the virtual conditions account for the magnetic material other than the measurement target by estimating a position of the magnetic material other than the measurement target on the basis of information obtained from an architectural plan, a survey using electromagnetic radar, or measurement with magnetic flux leakage testing.