摘要
A method of improving the accuracy of laser pulse range finding from ±10 m to ±1 m inexpensively by means of time scale up is described. Time scale up can stretch the entire flight time by a factor of 1 000 and then the stretched result is counted to calculate the distance. The use of this technique decreases the resolution of counting from nanosecond to microsecond, therefore a separate counting oscillator followed by an interpolation operation is unnecessary. This technique can improve the accuracy of laser pulse range finding inexpensively and effectively.
介绍了利用时间比例放大技术以低成本把脉冲激光测距精度提高到± 1m的方法 .利用时间比例放大法可以把激光脉冲往返于测程之间的时间按比例放大 1 0 0 0倍 ,放大后的结果用于计算被测距离 .这种方法把测距系统的计时精度从纳秒级降低到微秒级 ,从而降低了对系统时钟分辨率的要求 .采用时间比例放大技术可以有效地提高激光脉冲测距的精度 ,而且使测距系统成本低 。
