The authenticity and the representativeness of material sampling and Measuring on site directly influence the objectiveness and accuracy of the measured data and the result judgement.

施工现场材料取样和检验的真实性和代表性直接影响检测数据和结果判定的客观性和准确性。

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In practice, considering the error caused by data sampling, author has made use of program judgement method which belongs to digital filter method to make error signal be within allowable scope.

在实际工作时，考虑数据采集时所引起的误差，利用数字滤波中的程序判断法以控制误差信号在允许的范围之内。

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By making use of Z depth efficiency in error judgement of sampling point and utilizing reliability of vector partition, it can define the cutting error on real time.

利用Z高度法效率高的优点，判断采样点是否超差；利用矢量分割法检测结果可靠性高的优点，求解沿着设计曲面的法矢方向以及采样点到刀具扫略体的距离（切削误差）。

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