一、问题的提出在工业企业中,经常会碰到直线度误差评定的问题,诸如机床导轨的直线度以及平尺的直线度误差评定等等。目前大部分资料介绍的直线度误差数据处理,一般均采用作图计算法。因为作图法直观明了,加之计算简单方便,故测量人员也多喜用此法。但由于作图误差的存在,常会引起评定失误;其直线度误差的评定是否满足最小条件?则难断定。鉴于 First, the issue raised In industrial enterprises, often encounter straightness error assessment issues, such as the straightness of the machine tool guide rail and flatness straightness error assessment and so on. At present, most of the data described in the straightness error data processing, are generally used to calculate the calculation method. Because mapping method is intuitive and clear, coupled with the calculation is simple and convenient, so the surveyors also like to use this method. However, due to the existence of mapping error, often lead to evaluation error; its straightness error assessment to meet the minimum conditions? It is difficult to determine. Given that