thread contour

The inspection and estimate of the thread contour curve were completed by using laser gauge to measure the dimension of the thread contour curve in the transverse section, and using raster to measure the axial displacement of the precision worktable under the thread test criterion.

利用激光测量头检测螺纹轮廓在横截面上的尺寸，结合由光栅测得的精密平台的轴向位移量和螺纹合格的判断标准完成螺纹轮廓曲线的检测和评价。

Finally, the chain code of object contour of the image is obtained. 4 The chain code table is used to realize thread contour tracking and identification.

提出使用链码表来进行螺纹轮廓跟踪和识别。

The both-way inclination optical measurement is presented based on the thread contour character, solves the problem that traditional optical method is hard to measure the large slope object and increases the value collection accuracy of the thread profile.

针对螺纹形面特点，提出了光学双向倾斜扫描坐标测量方法，双向倾斜扫描测量方法克服了传统光学方法对大倾斜面物体难以测量的困难，提高了螺纹形面数据采集精度。

When measuring, based on the segmented contour line of thread, the measurement program to calculate and measure the geometrical parameters of internal taper thread is compiled. Precisions of pitch, thread angle and taper angle reach ± 0.03mm 、± 0.24 ° and ± 0.02 °.

使用自编程序测量计算了内螺纹的螺距、牙型角和锥角，测量精度分别达到了003mm，024°和002°。

By using the principle of the formation of rotor thread contour and the relevant knowledge, the present article deduced a principle for calculating the fixed value of rotor and gave a more simplified method.

本文根据转子齿形的形成原理及有关知识，推导出转子的定值计算原理，并给出较为简便的定值计算方法。