Abstract
To ascertain the stress inside silos we developed several kinds of sensors with specific applications: (1) pressure cells, (2) two-directional stress cells, (3) slipping velocity detectors, (4) surface temperature detectors, and (5) internal temperature and slipping velocity detectors.
The detecting sections of pressure cells and two-directional stress cells comprise a parallel plate structure and strain gauges that can detect pressure, and pressure and frictional stress, respectively.
Measurements of physical phenomena in silos lead to the following conclusions: Pressure cells and two-directional stress cells (1) work as designed, and (2) they are capable of elucidating the fundamental physical phenomena in silos.
† This report was originally printed in J. Soc. Powder Technology, Japan. 34(5), 312-323 (1997) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.
