Development of a Prototype of Laser CT Scanning Profiler for Measuring 2-D Sedimen Concentration Distributions

Abstract

A prototype of measuring instrument using a laser CT scanning method, was developed for nearly instantaneous spatial concentration distributions of turbid liquids, such as sediment, in a cross-sectional plane field, which may be one of the very important factors to solve problems in hydraulics, rivers, coastal engineering, etc. The instrument was constituted of a scanning multipoint laser light transmitting unit, a photo detection array unit, a control unit, and a personal computer with signal and data processing software based on the principle of the inverse estimation. Some laboratory test for a real concentration field proved the usefulness of the instrument.