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在大量进行土的颗粒分析中,比重计法是采用最广的一种,但应用此法时须根据斯笃克定律及比重计各种校正值用图表方法间接换算某粒径及其百分数,计算手续繁琐,影响生产效率的更进一步提高。为此应用计算尺的原理设计了一种计算尺,而利用这种计算尺就可根据某一沉降时间的比重计直接读数求得某粒径及其百分数值,不仅可提高工作效率,而且其精度亦有所提高。
In large quantities of soil particle analysis, the hydrometer method is the most widely used, but the application of this method according to Stirrups and hydrometer various correction values using chart method to indirectly convert a particle size and its percentage, Calculation procedures cumbersome, affecting the further improvement of production efficiency. To this end, the principle of slide rule is used to design a slide rule, which can be used to calculate the particle size and its percentage based on the direct reading of a sedimentation time scale, which not only improves the work efficiency, Accuracy has also improved.