高精度相位法超声测距系统研究  

Study of a phase ultrasonic range measurement system with high precision

作　　者：张向珂[1] 张世庆[1] 闻凤连[1] 田洪胜[1] 

机构地区：[1]江苏大学机械工程学院测控技术与仪器系,江苏镇江212013

出　　处：《传感器与微系统》2010年第2期45-47,共3页Transducer and Microsystem Technologies

基　　金：国家"863"计划资助项目(2006AA10Z263);国家自然科学基金资助项目(30771243)

摘　　要：为了提高超声波测距仪的测量精度,介绍了利用超声波相位差进行测距的原理,提出了一种新颖的利用超声波相位差进行测距的技术。该技术采用单片机完成超声波的产生和发射,利用计数器和相位比较器得出测距结果,并通过实时测量环境温度修正超声波传播速度,提高了该超声波测距系统的精度。完成了该测距检测系统的硬件软件的设计,并进行了详细的理论和实验研究。实验结果表明:提出的设计方法精度高、重复性好、可靠性高,具有较好的应用前景。In order to enhance the ultrasonic wave distance gauge the measuring precision, the principle of range finder by using ultrasonic wave phase difference is introduced. A novel range finder is proposed using ultrasonic wave phase difference is introduced. This technology uses the monolithic integrated circuit to complete the ultrasonic wave, the production and the launch, the range finder result is obtained using the counter and the phase comparator. Through real-time measurement of ambient temperature, ultrasonic propagation speed is revised; and the ultrasonic ranging system precision is increased. Hardware and software design of this range finder detecting system are completed, and the detail study on theory and the experiment are carried on. The experimental results show that the proposed design method has high precision, good duplication, high reliability, and good application prospect .

关 键 词：超声波 相位法 计数器 温度检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]