This paper made full use of machine vision's characteristics of non-contact, high efficiency and high precision, and develop an instrument for on-line measuring parameter of oil pipe thread.

本文利用机器视觉非接触式、高效、高精度的特点，开发出基于机器视觉的石油管螺纹参数在线测量系统。

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The Model SPC/L301 viscometer has a 1 1/4" NPT thread to easily install into a process line using a "Tee", or into a large tank or pipe, using a weld ferrule.

L301型粘度计有一个1/4” NPT的螺丝配合一个T型的管道，可以很容易的安装到管线上，或者用一个焊接套环，安装到大罐子或管道内。

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