合肥市科技馆速度测试展台控制系统研制

Research and Development on Controlling System of Speed Measuring Platform in Hefei Science and Technology Museum

系统采用AT89C55单片机为控制核心,高速红外线光电开关为输入信号,完成直线速度的测试和语音动画输出.在对语音芯片ISD1420深入实验研究的基础上,介绍了芯片工作模式和电气原理设计方法.分析研究了SED1335液晶显示模块,介绍了接口电路设计,以及汉字和图形的数据提取方法.

A linear speed measuring system, which has phonetic and animated output equipment, has been developed. The system's controlling CPU is a AT89C55 microcomputer, and it adopts quick reaction infrared photo triode as the input signal. The phonetic chip ISD1420 has been carefully researched, and the chip's working mode and basic circuit diagram are both described in the paper. Based on the study of SED1335 liquid crystal display device, the interface circuit between AT89C55 and SED1335 are introduced.