| 摘要 |
There is described a safety system (1) having a hazard area (2) containing a reference pattern (3), and a vision sensor (4) having an acquisition module (5) for acquiring an image containing the reference pattern (3) in an area portion (P) of the hazard area (2); a memory (6) containing a number of discrimination thresholds (SC i ) related to respective predetermined light ranges (L i ); and a number of computing modules (A i ), each of which has a binarization module (B i ) for discriminating the pattern in an image section (11) as a function of a respective discrimination threshold (SC i ), and a decision module (C i ) which determines a non-intrusion state when a predetermined match is found between the discriminated pattern and the reference pattern; the sensor (4) also having a generating module (12) which determines a non-intrusion condition when at least one of the computing modules (A i ) determines a non-intrusion state. |
