【作者】 方欣欣； 王子刚；

【Author】 Fang Xinxin Wang Zigang (College of information, Inner Mongolia Polytechnic Univ. ,Huhhot 010062,China)

【机构】 内蒙古工业大学信息学院；

【摘要】 提出了对三坐标测量机X向位置偏差δ_x（x）测量不确定度评定的一种模式,测量仪器采用了双频激光干涉仪。在数学模型的建立过程中充分考虑了δ_x（x）的溯源性,数学模型主要反映了三坐标测量机X向温度偏离20℃对测量值的影响。在不确定度传播律中较好的解决了各不确定度来源项对合成标准不确定度的贡献途径问题。在结论中讨论了u(δ_xx)的量值传递问题并提出了减小u(δ_xx)的对策。更多还原

【Abstract】 The author introduces a model that can express uncertainty in measurement of X-direction’s positional deviation of coordinate measuring machines (CMM) under qusi-rigid body model. The instrument in this measurement is a laser interferometer. The mathematic model built in this measurement shows how the departure of temperature of CMM’X-direction frori 20 C influences the measuring value. In the law of propagation of uncertainty, the way of how the sources of uncertainty contribute to combined uncertainty has been determined. In the conclusion, the issue of quantity transmission of u(δxx)is discussed and the method to reduce the uncertainty of positional deviation is given.更多还原