| 摘要 |
Fish is sorted according to quality by the fish 11 being caused to swim through a translucent canal or tube 1 in which it is subjected to radiation of at least one source of radiation 2. The radiation is detectable by a number of photo-detectors in cameras 20 in a row along the length of the tube 1 and the signals from the respective photo-detectors are fed into a computer where the length of the fish is calculated from the degree of masking of the photo-detectors by the fish. A device for implementing the method comprises a translucent tube 1, at least one source of radiation 2 and a number of photo- detectors arranged along the length of the tube 1 . The photo-detectors emit a signal depending on whether a fish 11 is present in the tube 1 between a photo-detector (6) and the source of light 2. Each photo detector is arranged in a camera 20, and in front of the photo-detector there is arranged a cylinder lens (8 Figure 2) with its longitudinal axis oriented perpendicular to the longitudinal axis of the tube 1. An ultrasound probe 13 is preferably arranged in the tube 1 to form a visual/digitalized image of the fish 11 internally. <IMAGE> |
