After introducing the operating principle and structure design of the strip shape measuring roll based on Pneumatic bearing, the design and calculating method of the orifice are analyzed.

本文在介绍空气轴承式板形检测辊的工作原理、结构设计的基础上，分析了节流孔的设计和计算方法。

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For measuring the pipe orifice, a computer vision method is used.

为了测量管口的尺寸，通常采用计算机视觉方法。

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Traditional orifice plate flowmeter had some demerits such as low measuring precision and high power dissipation.

传统孔板流量计测量精度较低，功耗较高。

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