| 摘要 |
The method involves intercepting the object with two light beams at different angles and detecting the resulting shadows. The beams are mutually offset in a cross-sectional plane perpendicular to the object's longitudinal axis at a defined angle. The beam incidence angles are oblique and the first corresponds at least approximately to the second. The object passes through a protection device between light sources and receivers. The method involves intercepting the object at a measurement point with two light beams at different defined angles and detecting the resulting shadows, whereby the beams are mutually offset at a defined angle (gamma) in a cross-sectional plane perpendicular to the object's longitudinal axis. The beam incidence angles (alpha, beta) are oblique and the first corresponds at least approximately to the second. The object is passed through a protection device (7.1-7.3) between light sources and receivers. Independent claim is also included for an arrangement for implementing the method. |
