移動床水理現象の自動計測制御並びにデータ処理に関する研究

Abstract

This study was carried out as a joint work among the research sections of DPRI concerning with experimental hydraulics. Various methods and problems about the measurement, control and analysis in sediment hydraulics were discussed and some of them were improved in this study as follows:(1) Automatic measurements of sediment discharge including direct and indirect methods were improved. Indirect methods consist of sonar and ultra sonic image analyses.(2) A new measurement method of suspended load concentration using continuous pumping and weighing was devised.(3) A new type sand feeder for wet sand was devised.(4) A carriage system driven along arbitrary curves was devised and applied for the experiment on bed variation in a meandering channel.(5) A high-speed inteligent type carriage for the calibration of velocity meters was introduced and applied for the calibration of an electro-magnetic velocity meter.(6) An optical 3-dimensional bed profile measurement system using two theodolites and a personal computer was divised and applied for an experiment in an inclined wide flume.(7) An attachment made of paste for the ultra-sonic bed profiler was devised which extended its applicable lower limit depth to infinitesimally small one.(8) Picture processing by the cross-correlation was refined using CCD camera unit and a work station and applied for flood flow analyses. This technique was also applied to an automatic tracer tracking of video image and topography analysis.(9) A new algorithm for plane partitioning by triangles constituted by adjacent points was devived and applied to the linear interpolation of the data.