CAJ | 학술논문

根据刘建宝、於海明、董玉秀和周向玲等对不同颗粒物质采用测定静止角的不同方法分析对比，指出其测定颗粒物质静止角的不同方法和适用范围。通过对比得出：直接观测量角器法测定堆积角存在直接观测、操作简便的优点，但是测量结果系统误差较大；自由下落形成颗粒堆积的测量方法有2种，都存在由于颗粒物质积落体成堆积椎体过程中因冲击导致的锥顶秃顶和因惯性导致的锥底非斜直，对沙漠沙静止角的测量存在显著的系统误差，导致实际的测定数值不等于静止角的真实值；刘建宝等利用相似形二次测量进行误差修正的测量方法繁琐，且存在一定的误差。周向玲等人利用沙堆堆积过程录像后转为图像处理求堆积静止角的方法，不需要多次测量底面半径和高度，直接减少了系统误差带来的影响，此方法的适用范围广，并可以同时定多个静止角，降低了实验的复杂度和重复数，便于快速测得物质的静止角值且精确度较高。
근거류건보、어해명、동옥수화주향령등대불동과립물질채용측정정지각적불동방법분석대비，지출기측정과립물질정지각적불동방법화괄용범위。통과대비득출：직접관측량각기법측정퇴적각존재직접관측、조작간편적우점，단시측량결과계통오차교대；자유하락형성과립퇴적적측량방법유2충，도존재유우과립물질적락체성퇴적추체과정중인충격도치적추정독정화인관성도치적추저비사직，대사막사정지각적측량존재현저적계통오차，도치실제적측정수치불등우정지각적진실치；류건보등이용상사형이차측량진행오차수정적측량방법번쇄，차존재일정적오차。주향령등인이용사퇴퇴적과정록상후전위도상처리구퇴적정지각적방법，불수요다차측량저면반경화고도，직접감소료계통오차대래적영향，차방법적괄용범위엄，병가이동시정다개정지각，강저료실험적복잡도화중복수，편우쾌속측득물질적정지각치차정학도교고。
According to the different methods used by LIU Jian-bao,YU Hai-ming,DONG Yu-xiu and ZHOU Xiang-ling,et al,to measure an angle of repose for different particulate matter,we measured the angle of repose and analyzed their advantages and disadvantages,and provided a reference for the fu-ture research of particulate matter repose angle.By comparsion,it is shown that there is a direct observa-tion for the direct observation accumulation angle protractor method,and it is an advantage of simple op-eration,but the measurement result is poorer in the system error.There are two kinds of measuring method in accumulation of particles form the free fall.Because of product fall into granular material in the process of vertebral bodies due to the impact caused by the cone top a bald head and the cone bottom of the inclined straight as a result of inertia,there is a remarkable system error in measurement of desert sand re-pose angle.The actual measured value is not equal to the angle of repose of real value.LIU Jian-bao,et al,used the measurement method of similar-type secondary measurement error correction,which is tedi-ous,and there are still some errors.ZHOU Xiang-ling,et al,used the sand accumulation process after the video into image processing for accumulation method of angle of repose,which do not need any meas-urement base radius R and height H,and reduces the effects directly from the system error.This method is of a wide scope of application,which can also determine multiple angle of repose reduce the complexity of the experiment and the repeat number.Thus it is rapid to measure the value for repose angle of material with higher accuracy.