Caliper board depends on the diameter of pipe diameter, and the need to consider the design of pipe diameter changes, general for the minimum 95% of the pipe inner diameter theory.
测径板的直径取决于所测管段的内径，并需考虑到该管段的变径设计，一般为所测管段最小理论内径的95%。
In this paper, a photoelectric instrument for measuring inner diameter of steel pipe is introduced, in which the linear CCD is used as sensor, and 8031 monolithic computer as master control system.
介绍了一种检测细长钢管内径的光电检测装置。该装置利用线阵CCD作传感器，采用8031单片机作为主控制。
In this paper, a photoelectric instrument for measuring inner diameter of steel pipe is introduced, in which the linear CCD is used as sensor, and 8031 monolithic computer as master control system.
介绍了一种检测细长钢管内径的光电检测装置。该装置利用线阵CCD作传感器，采用8031单片机作为主控制。
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