流砂量測定器の試作研究

Abstract

An equipment for automatic measurement of sediment discharge was devised. It consists of asand trap, weighing mechanism and conveyers.The sand trap is made of 0.3 mm mesh wire screen which is attached to the downstream endof a 50 cm wide flume. The sand particles gathered by the screen are conveyed to the weighingmechanism by means of a pump system. The weighing mechanism has five cups made of screen, which are cyclicly shifted in turn by a belt conveyer.In five positions, the functions of receiving sand, weighing, dropping sand washing and waitingare repeated every one minute.This device is applicable to the condition of the flow discharge between 1 and 40 1/s and thesediment discharge between 0.2 and 1 g/min for medium and coarse sand.