New Methods for Detecting Physical Phenomena in a Silo [Translated]†

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.