游标卡尺、螺旋测微器及秒表的原理和读数 课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,游标卡尺、螺旋测微器的原理和读数,构造与作用,0,1,2,3,4,5,6,7,8,9,0,内测量爪,锁定旋钮,主尺,深度尺,0,1,2,3,4,5,6,7,8,9,10,外测量爪,被测球体,游标尺,两条零刻线的间距等于各测量点的间距,10,分度游标卡尺的原理,主尺一大格为,1cm,一小格为,1mm,游标,10,小格，总长,9mm,，,因此游标尺的每一分度与主尺的最小分度相差,0.1mm,0,5,10,0,1,10,分度游标卡尺的读数,0,5,10,0,1,左右测脚合在一起，游标的零刻度线与主尺的零刻度线重合,0,5,10,0,1,游标的第一条刻度线与主尺的,1mm,刻度重合则左右测脚相距多少？,0.1mm,读数练习,0,5,10,0,1,0.3mm,0,5,10,0,1,1.4mm,0,5,10,0,1,4.1mm,0,5,10,0,1,10.5mm,20,分度游标卡尺的原理,主尺一大格为,1cm,一小格为,1mm,游标,20,小格，总长为,19mm,，,因此游标尺的每一分度与主尺的最小分度相差,0.05mm,0,10,20,0,1,2,3,20,分度游标卡尺的读数,0,10,20,0,1,2,3,左右测脚合在一起，游标的零刻度线与主尺的零刻度线重合,0,10,20,0,1,2,3,游标的第一条刻度线与主尺的,1mm,刻度重合则左右测脚相距多少？,0.05mm,读数练习,0,10,20,0,1,2,3,1.00mm,0,10,20,0,1,2,3,3.25mm,0,10,20,0,1,2,3,10.75mm,0,10,20,0,1,2,3,9.40mm,0,5,10,0,1,2,3,另一种,10,分度游标卡尺,主尺一大格为,1cm,一小格为,1mm,游标,10,小格，总长为,19,mm,，,因此游标尺的每一分度与主尺的最小分度相差,0.1,mm,游标的第几条刻度线与主尺的刻度线重合，就是零点几毫米。,另一种,10,分度游标卡尺的读数,0,5,10,0,1,2,3,1.7 mm,0,5,10,0,1,2,3,12.1 mm,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,10,50,分度游标卡尺的原理,主尺一大格为,1cm,一小格为,1mm,游标,50,小格，总长为,19mm,，,因此游标尺的每一分度与主尺的最小分度相差,0.02mm,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,10,10.24,mm,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,10,17.00,mm,原理：精密螺纹的螺距为,0.5,mm,，即,D,每旋转一周，,F,前进或后退,0.5,mm,。可动,刻度,E,上的刻度为,50,等份，每一小格表示,0.01,mm,。,螺旋测微器,螺旋测微器的读数方法,：,测量时被测物体长度的整数部分有固定刻度上读出，小数部分由可动刻度,E,读出（注意要估读一位数）。读数时，特别要注意固定刻度上表示,0.5,mm,的刻度线是否露出。,15,20,5,10,0,10,15,20,5,10,1.601,mm,15,20,5,10,0,20,25,30,15,10,9.694,mm,15,20,5,10,0,20,25,30,15,10,10.190,mm,15,20,5,10,0,10,15,20,5,0,15,20,5,10,0,20,25,30,15,10,3.603,mm,8.695,mm,如果有系统误差怎么办？,15,20,5,10,0,0,5,10,45,40,15,20,5,10,0,10,15,20,5,10,下面测量的读数分别应该是多少？,1.615,mm 1.511mm,15,20,5,10,0,10,15,20,5,0,秒表,0,31,2,33,4,35,6,37,8,39,41,10,43,12,14,45,16,47,18,49,20,51,22,53,24,26,55,57,28,59,0,1,2,6,7,8,9,10,11,3,4,5,12,13,14,2,分,7.60,秒,0,31,2,33,4,35,6,37,8,39,41,10,43,12,14,45,16,47,18,49,20,51,22,53,24,26,55,57,28,59,0,1,2,6,7,8,9,10,11,3,4,5,12,13,14,1,分,51.40,秒,0,31,2,33,4,35,6,37,8,39,41,10,43,12,14,45,16,47,18,49,20,51,22,53,24,26,55,57,28,59,0,1,2,6,7,8,9,10,11,3,4,5,12,13,14,2,分,23.35,秒,