摘要
基于条形码技术实现自动读取卡上信息,并产生DTMF(DoubleTuneMultipleFrequency)信号。利用89C51作为控制和接口单元,通过电气性能匹配,提供了条码阅读器与DTMF拨号集成电路的接口。规定了条形码编码标准并提出软件实现的方案以及从电话线获取系统工作电源的方法。
The system can automatically identify the information on cards and convert it to DTMF(Double Tune Multiple Frequency) signals using bar code technology. With the electric characteristics matching, the scheme of the interface between bar code scanner and DTMF IC was developed using 89C51 as the control and interface core. The bar code coding standard was prescribed and the method to gain the power supply from telephone line was also introduced.
出处
《电子器件》
CAS
2003年第3期304-307,共4页
Chinese Journal of Electron Devices
基金
浙江大学学生研究训练程序立项项目
