介绍了一种利用单片机技术实现高精确度数字式转速测量系统的方法。这种转速测量系统具有测量精确度高、采样速度快、测量范围宽和测量精确度与被测转速无关等优点, 具有广阔的应用前景。 关键词: 转速测量; 单片机; 光电传感器 Abstract : This paper describes a high precision measurement system of rotation rate. The measurement system is of high accuracy , fast sampling speed , wide measuring range. Its measuring precision bears no relation to the rotation rate being measured. Therefore , this measurement system can be used widely. Key words : measurement of rotation rate ; single - chip microcomputer ; photoelectricity sensor