| 摘要 |
<p>PURPOSE:To accurately detect the number and size of bodies to be detected by arranging a fluorescent fiber in the passing area of the body to be detected and arranging light sources parallel to the fiber and a photodetector on the fiber end surface. CONSTITUTION:The fluorescent fiber 5 whose core 51 is made of resin containing fluorescent coloring matter is arranged in the passing area of the bodies 1 to be inspected which are mounted on a conveyor, etc. The light sources 6 which make parallel light beams incident on the fluorescent fiber 5 are arranged and the photodetector 7 which detects variation in the quantity of light pertaining to the intrusion of the bodies 1 to be detected is provided on the fiber end surface. When the bodies 1 to be detected enter the passing area to cut of K of N incident light beams, the photodetector 7 detects variation in the intensity of projection light and the number and size of the bodies 1 to be detected are detected from a specific arithmetic expression; and the detection accuracy is improved and the fiber is easily connected to a signal processing circuit.</p> |
