超声波测距完整资料包，包含原理图，多个例程，2011全国大学生电子设计竞赛原件清单里有超声波模块，欢迎大家下载-Ultrasonic Ranging complete information package, including schematics, more routine, the National Undergraduate Electronic Design Contest 2011 original list, there are ultrasonic module, welcome

这是一个基于单片机的超声波测距的设计与实现的可以用52或51单片机来实现-Design and Implementation of a microcontroller-based ultrasonic ranging can use 52 or 51 microcontroller

测量距离源程序，不懂怎么描述了，自己进去-Measure the distance of the source, do not know how to describe, and he went to see