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一、前言各种经纬仪精密转台都有精密轴系,它的精度直接影响到整台仪器的工作精度。仪器的轴系是仪器测角基准,因此,对它们的实际位置与理想位置之差必须有严格要求。轴系误差是直接产生仪器测角误差的重要因素之一,它包括调平误差和晃动误差。前者为系统误差,可在数据处理中消除;后者为随机误差,与钢珠不圆度、椭圆度和轴的椭圆度以及材料硬度不均匀性和转动部分不平衡等因素有关。轴系晃动造成仪器测角误差。仪器在出厂前测出轴系误差量是很必要的。
First, the foreword A variety of theodolite precise turntable has a precision shaft, its accuracy directly affects the accuracy of the entire instrument. The shaft of the instrument is the instrument angle reference, therefore, the difference between their actual position and the ideal position must have strict requirements. Shafting error is one of the important factors that directly cause the measurement error of the instrument. It includes leveling error and shaking error. The former is a systematic error and can be eliminated in the data processing. The latter is a random error, which is related to the non-circularity, ellipticity and ellipticity of the steel ball, as well as the unevenness of the material hardness and imbalance of the rotating part. Shaft shafting caused angle measurement error. It is necessary for the instrument to measure the amount of shaft error before delivery.