单片机中定时/计数器在消除瞬时干扰中的应用

介绍了单片机采样控制系统中一种消除瞬时干扰的方法。该方法利用干扰信号作用时间比实际所需采样信号的作用时间相差特别大的特点,通过对单片机内的定时/计数器进行编程来消除瞬时干扰。这种方法原理简单,经济实用,既避免了复杂的硬件电路设计,又使单片机本身的资源得到了充分利用。

A method of eliminating instantaneous disturbance in sampling control system of microprocessor is introduced in this paper. In the light of the character that the actuating signal actions much longer than the disturbing signal, instantaneous disturbance can be eliminated by the programming to the timer/ counter in this method, which is characteristic of simpleness, e-conomy and practicality. The study makes full use of the resource of the microprocessor and avoids the design of complicated hardware circuit.