【摘要】 根据光杠杆的原理,借助于激光器、反射镜等器件,设计制作了一个高精度水准仪;用螺旋测微器测量水准仪平移的距离,从而得到钢丝长度的微小变化值.改进后的实验装置科学直观,准确度高,重复性好.更多还原

【Abstract】 In order to measuring the small variation of the steel-wire’s length,a leveling bench of high precision is made with laser,reflector,etc.The small variation of the steel-wire’s length can be obtained by measuring the displacement of leveling bench with micrometer.The improved device is scientific and highly accurate,to be understood easily and mastered by student.更多还原