齿廓偏差； 有效长度； 起测点； 终测点；
Tooth profile deviation; Effective length; Initial point; End point;
并以某渐开线圆柱齿轮为例计算齿廓偏差，计算结果表明，该方法正确、可行。
By taking an involute cylindrical gear as an example, the tooth profile deviation is calculated. The results show that the method is correct and feasible.
因齿距偏差测量技术已经很成熟，所以本论文的在位测量主要定位于检测齿廓偏差和螺旋线偏差。
Because pitch deviation measuring technology is very mature, the main research objective of this thesis is laid on the checkout of profile deviation and helix deviation.
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