光电编码器判别电路和12位计数电路设计.doc

学号： 常 州 大 学 课程设计（说明书） （08届） 题 目 光电编码器判别电路和12位计数电路设计 学 生 学 院 机械工程学院 专业班级 机制082 校内指导教师 专业技术职务 教授 二○ 摘 要：光电编码器是高精度控制系统常用的位移检测传感器。当控制对象发生位置变化时，光电编码器便会发出 A、B 两路相位差 90 度的数字脉冲信号。正转时 A 超前 B90 度，反转时 B 超前 A90 度。脉冲的个数与位移量成比例关系，因此通过对脉冲计数就能计算出相应的位移。 关键词：；；； 目 录 摘要····························································································Ⅰ 目录····························································································Ⅱ 引言····························································································Ⅲ 任务书························································································Ⅳ 1 总体设计方案········································································1 2控制电源电路设计·································································2 2.1 元件选择················································································2 2.2 电路原理················································································4 3 判别电路················································································5 3.1 元件选择················································································5 3.2 电路原理················································································10 4 12位计数电路········································································11 4.1 元件选择················································································11 4.2 电路原理················································································14 5 预置电路················································································15 6 电路原理图及PCB印刷电路··············································16 7 小结体会················································································18 参考文献························································································19 附录A·················································