Itoi Shigeru
Affiliate Master
Yamaguchi University
Three-dimensional measurement of granular surface profile by ultrasonic array sensor
Technology reports of the Yamaguchi University Volume 4 Issue 5
Page 357-369
published_at 1991-12
Title
Three-dimensional measurement of granular surface profile by ultrasonic array sensor
Source Identifiers
Ultrasonic measuring system has been developed to image three-dimensional surface of granular materials stored in a hopper for more accurate estimation of content amount than conventional level measuring method. Eight bimorph type linear array ceramic sensors compsed of eight receiving elements each were located in a concentric configuration around a condenser type emitter sendig 40kHz pulses. An incident angle to the arrays and a distance from surface were measured by a phase difference between adjacent receiving elements and by a sound propagation time between transducer, respectively. On the basis of properties studied by preliminary experiments on particle sizes, shapes, and surface conditions, model patterns of concave and convex in a vessel were tested to investigate the characteristics of the equipment. Estimated profiles were displayed in an stereogram manner showing good results especially for the concave profiles with an average error of ±8mm in height.
Languages
eng
Resource Type
departmental bulletin paper
Publishers
山口大学工学部
Date Issued
1991-12
File Version
Version of Record
Access Rights
open access
Relations
[ISSN]0386-3433
[NCID]AA0086073X
Schools
工学部