In order to solve the problems in diameter measurement including wear and tear on work pieces, low accuracy, and impossible to achieving dynamic measurement, the photoelectric detection method based on linear array CCD is adopted. By cooperating optical system, the non-contact diameter measurement of the work pieces is implemented to satisfy the requirements of high accuracy, fast speed and non-contact for diameter measurement in modern industrial production. The design of CCD signal detection circuit, signal conditioning circuit, and data processing circuit is researched. Experiments of measurement for 3 kinds of work pieces are conducted; and the errors are analyzed. The experiments indicate that the system can be used to measure work pieces within ip0. 5mm ~ cp30mm; the measurement accuracy is ±5μm.%为解决直径测量系统中存在的对工件有磨损、测量精度低、无法实现动态测量的问题,提出采用光电传感器件——电荷耦合器件线阵CCD光电检测方法,配合光学系统实现工件的非接触直径测量,满足了现代工业生产对直径测量系统提出的高精度、快速、非接触和实时反馈的需求.对线阵CCD的信号检测电路、调理电路及数据处理电路设计进行了研究,并进行了三种工件直径测量试验和误差分析.试验表明,该系统可对φ0.5 mm～φ30 mm的工件进行直径测量,测量精度为±5μm.
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