一种高精度超声波多路同步测距系统设计  

Design of Ultrasonic Multi-channel Synchronous Distance Measuring System with High Precision

作　　者：闫俊旭[1] 毕友明[1] 李晔[1] 

机构地区：[1]太原科技大学电子信息工程学院,山西太原030024

出　　处：《山西电子技术》2009年第5期3-4,13,共3页Shanxi Electronic Technology

基　　金：山西省普通高等学校大学生创新性实验项目资助(项目编号:20090015)

摘　　要：在分析传统超声波测距的基础上,研究了一种基于单片机和FPGA的高精度超声波测距系统。该系统采用了多路超声波先测速再测时测距的方法,自动调整计算过程中因环境变化而影响的声速参数变化,提高了系统的适应性,同时采用多路精确同步测量保证了测量的高精度。实验证明,该系统具备较高的灵活性,且采用125 kHz的频率也进一步提高了系统的测量精度。Based on microcontroller and FPGA, an ultrasonic distance measuring system with multi-channel synchronous measurement and high precision is studied. A new measurement method is adopted, which is firstly for speed and time measurement, then distance measurement. The change of sound velocity because of the vraious temperature can be adjusted automatically by the method. It improves the adaptability of system and ensures its high precision because of the multi-channel and synchronous measurement and with the using of 125 kHz frequency. The experimental results show the system is high flexible.

关 键 词：超声波 超声波测距 FPGA 单片机 

分 类 号：TP274.53[自动化与计算机技术—检测技术与自动化装置]