DETECTOR

摘要

This detector is provided with a sensor head (2), a storage unit (7), a data processing unit (8), a similarity detection unit (9) and a phase calculation unit (10). The sensor head (2) acquires surface data about an elongate body. The storage unit (7) stores first reference data and second reference data. The data processing unit (8) generates processing data from the surface data. The degree of similarity calculation unit (9) calculates a first degree of similarity and a second degree of similarity. The phase calculation unit (10) calculates the phase of a similarity vector having the first degree of similarity and the second degree of similarity as components.