一、最小变形原则最小变形原则是计量检测人员在检测过程中必须遵循的原则,工件因自重而引起的弯曲、变形等将直接影响测量准确度,计量检测人员应着重考虑选择合适的支撑点,使其变形最小。长度为L的工件,支撑点距两端的距离为a,当a=0.2203L(可简化为a=(2/9)L)时,工件中心轴线上的长度变形为最小,该支撑点称为白塞尔点,一般在线纹尺测量时采用此种支撑;当a=0.2213L(可简化 First, the principle of minimum deformation The minimum deformation principle is the measurement of testing personnel in the testing process must follow the principle of the workpiece due to self-weight caused by bending, deformation and so will directly affect the measurement accuracy, measurement testing personnel should focus on selecting the appropriate support points, Make it the least deformation. The length of the workpiece L, the distance between the support point from both ends of a, when a = 0.2203L (can be simplified as a = (2/9) L), the length of the workpiece center axis deformation is minimal, the support point is called Whitehead point, the general line ruler measurements using this support; when a = 0.2213L (can be simplified