本文介绍了采用光学成象法，以拼接CCD为光电接收器的外径测量系统的原理及其结构。
The principle and structure of the diameter measuring system. to which the optical imaging method is applied and the assembled CCDs are used as photoelectric detector, are presented in the paper.
介绍了系统的功能、硬件设计、软件设计和性能指标，重点分析了非接触式ic卡、证件号码光学字符识别(ocr)、票据打印及分时传送和纸币接收器等关键技术的实现。
The function, design, and performance index of the system are described, and the techniques of non-contact IC card, OCR of passport number, bill printing and cash acceptor are mainly discussed.
介绍了系统的功能、硬件设计、软件设计和性能指标，重点分析了非接触式ic卡、证件号码光学字符识别(ocr)、票据打印及分时传送和纸币接收器等关键技术的实现。
The function, design, and performance index of the system are described, and the techniques of non-contact IC card, OCR of passport number, bill printing and cash acceptor are mainly discussed.
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