The Horizontal detection for the vessel supporting carriage by using position sensing device (PSD) and microcomputer technology is introduced.
介绍采用位置敏感检测器件（PSD）及微机技术测量承船厢的水平偏差程度。
The position sensitive detector(PSD) can be used for many types of precision and contactless dgmatic distance detection.
光电位置敏感探测器（PSD）已应用到非接触式高精度动态位移测量中。
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