基于覆铜板坐标定位手写绘图板设计
发布时间：2019-05-20 20:10
【摘要】：系统能够实现手写绘图板功能,当触笔接触覆铜板时,能够通过显示屏LCD12864显示出触笔所在的坐标位置、象限以及触笔轨迹等信息。电路设计以单片机STC89C58为核心,基于惠斯通电桥原理,从覆铜板4个引脚分别引出4路信号,经仪表放大器INA128进行10 000倍差分放大进行PCB坐标定位,然后由TLC2543进行A/D转换,在单片机中建立数据库,用查表法在LCD12864液晶屏上进行显示。实验表明,所设计的手写绘图板系统能基本完成题目设计要求,并且有进一步开发与完善的空间。
[Abstract]:The system can realize the function of handwritten drawing board. When the touch pen touches the copper laminate, it can display the coordinate position, quadrant and touch pen track of the touch pen through the display screen LCD12864. The circuit design is based on the single chip microcomputer STC89C58. Based on the principle of Wheatstone bridge, four signals are derived from the four pins of the copper laminate, and the PCB coordinates are located by 10 000 times difference amplification through the instrument amplifier INA128, and then the A 鈮，
本文编号：2481925
[Abstract]:The system can realize the function of handwritten drawing board. When the touch pen touches the copper laminate, it can display the coordinate position, quadrant and touch pen track of the touch pen through the display screen LCD12864. The circuit design is based on the single chip microcomputer STC89C58. Based on the principle of Wheatstone bridge, four signals are derived from the four pins of the copper laminate, and the PCB coordinates are located by 10 000 times difference amplification through the instrument amplifier INA128, and then the A 鈮，
本文编号：2481925
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