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本文提出一种基于MCS－51的能脱机使用并控制多种手持式扫描仪的控制器的设计方法。该电路适用于各种常见的100-400DPI的手持式扫描仪，可完成对扫描仪的各种扫描控制，如30秒关机、拖动速率的判断、分辨率及灰度判断等，并且用RS232C与PC机进行通讯，完成对扫描图象数据的进一步显示、分析和处理，便于携带，便于进行现场的图象文字扫描处理。
This paper presents a design method based on MCS-51 that can be used offline and control a variety of hand-held scanners. The circuit is suitable for all kinds of common 100-400DPI hand-held scanner can be completed on the scanner of various scanning control, such as 30 seconds off, the drag rate of judgment, resolution and grayscale judgment, and with RS232C Communicate with the PC to complete the further display, analysis and processing of the scanned image data, which is easy to carry and easy to carry out on-site image text scanning processing.