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Itoi Shigeru

Affiliate Master Yamaguchi University

Measurement of Granular Surface Pattern in a Hopper by Ultrasnic Sensor (The 3rd Report)

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 39 Issue 1 Page 65-71
published_at 1988
KJ00000156706.pdf
[fulltext] 422 KB
Title
超音波による貯槽内粉面形状の計測(第 3 報)
Measurement of Granular Surface Pattern in a Hopper by Ultrasnic Sensor (The 3rd Report)
Creators Morimoto Eiji
Creators Itoi Shigeru
Creators Hayano Nobuo
Source Identifiers
Measuring equipment with ultrasonic sensor has been developed for the granular surface pattern recognition in a hopper. The estimation algorithm was proposed which utilized the intensity of the received sound and the period in which the wave moved back and forth. The inclination angle and spatial position of the measured point on the surface were determined from the values taking into account the directivities of the sensors, surface condition of the reflection, and attenuation of the sound through the path. The pattern was depicted by microcomputer considering the mutual relations between the locations of the measuring points and the constraint due to the physical properties of the materials treated. The method was applied to the instrument whose resonance frequency and half width were 66kHz and 5 degrees, respectively. The fundamental characteristics of the measuring unit such as frequency dependence, directivities, attenuation, and measurement error have been studied experimentally. Sufficient results were obtained in a model hopper system with sand whose mean diameter was approximately 300 microns for three surface patterns of plane, concave, and convex.
Subjects
機械工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1988
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部