APPARATUS FOR MEASURING ANGLE OF REPOSE

• Main Authors: INA TAKASHI, AOKI TAKESHI, YANAKA YUKICHI, SUZUMURA HIROSHI
• Format: Patent
• Language: English
• Published: 15.10.1999
• Edition: 6
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To measure with high accuracy, workability and safety by setting a measurement particle-supplying means set above a rotary stage for dropping measurement particles onto the rotary pedestal and a heating means, and measuring an inclination angle of a particle layer piled on the rotary stage. SOLUTION: A vacuum container 21 has a cylindrical electric furnace 22 inside. A funnel 24 is arranged at an upper part inside the electric furnace 22, and a rotary pedestal 25 is disposed at a bottom part inside the electric furnace. A feed pipe 28 for feeding measurement particles is set at an upper part of the funnel 24. After a predetermined quantity is injected, a hole of a bottom part of the funnel is shut by a stopper 29 having a circular conical leading end. A light-emitting part 31 with observation windows 30a, 30b and an image pickup device 32 as a light-detecting part are arranged at the side of two holes 23 of the electric furnace 22. In this constitution, the air in the vacuum container 21 is removed, gas is supplied from a cylinder 45 and heated by the electric furnace 22. Then, the stopper 29 is opened and measurement particles are injected from the funnel 24. When a predetermined pile is formed, light is projected from the light-emitting part 31 and the inclination of a shadow at the side of the other observation window 30b is measured.