PURPOSE: To previously sense deterioration of a fluid material by injecting cooling gas to an upper surface of a horizontal heat resisting glass plate provided on a lower part in a fluidized bed, continuously replacing the material on a periphery of an upper part of the plate, and continuously displaying a shape change of a particle size of the material at a present time by a condensing lens and an image detector.
CONSTITUTION: A fluid material shape detector having an inner tube 41 and an outer tube 42 is inserted into a fluid material 12, and connected to a controller for processing an image and calculating via a cable. A sapphirine heat resisting glass plate 43 having a small spectral polarization is inserted into an upper part of the tube 41 and condensing lenses 44a, 44b are inserted under the plate 43 by sealing it to an inner surface of the tube 41. Further, An image detector is provided thereunder. Cooling gas 45 is fed in a direction of an arrow, injected from nozzle ports 46a-46c to the plate 43, the lenses 44a, 44b to cool them, the material on the plate 43 is scattered to a periphery, and images of particle shapes are obtained via the lenses 44a, 44b and displayed.
FUJIMA YUKIHISA
AKIYAMA HIROSHI
