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一、前言近年来在泥沙研究中,为获得泥沙颗粒级配,已逐渐应用按照泥沙沉降原理,根据水温,沉距,直接在水中称出各组泥沙的重量,或采用浑水对透射光强度削弱的消光原理设计并制造的仪器,目前已有TZC—2型自动记录粒度测定仪,GDY—1型光电颗粒分析仪等。这类装置虽用电子电位差计自动记录或用数字电压表显示,仍需靠人工通过沉降过程曲线作图运算方能得出泥沙颗粒级配,而在河工模型试验过程中采用的简易式光电颗分仪,虽具有简便易行,迅速等优点,也需定时由人工观读,计算与校核的工作还是比较繁琐的。
I. Introduction In recent years, in order to obtain sediment particle size distribution, sediment particle size distribution has been gradually applied in accordance with the sedimentation principle, according to the water temperature and the sinking distance, the weight of each group of sediment is directly weighed in the water or the muddy water At present, there are TZC-2 type automatic recording particle size analyzer and GDY-1 type photoelectric particle analyzer, which are designed and manufactured on the extinction principle of the transmitted light intensity weakened. Although these devices are automatically recorded with an electronic potentiometer or displayed with a digital voltmeter, it is still necessary to rely on the sedimentation process curve to calculate the grading of sediment particles manually. However, the simple formula adopted in the river model test Optoelectronic signal meter, although has the advantages of simple and easy, rapid and so on, but also need to be timed by artificial reading, calculation and checking work is quite complicated.