文献类型：期刊文献

中文题名：基于HC-SR04模块的时差法声速测量

英文题名：Time-Difference Method Based on HC-SR04 Module for Acoustic Velocity Measurement

作者：张克声 隆昌喜

第一作者：张克声

机构：[1]贵州理工学院电气与信息工程学院

第一机构：贵州理工学院电气与信息工程学院

年份：2018

卷号：36

期号：2

起止页码：54-57

中文期刊名：机械与电子

外文期刊名：Machinery & Electronics

收录：CSTPCD

基金：国家自然科学基金(61461008);贵州省科学技术基金(黔科合J字[2015]2065);国家留学基金(201708525058);贵州理工学院高层次人才引进项目(XJGC20140601)

语种：中文

中文关键词：HC—SR04模块;声速测量;时差法;超声波测距模块

外文关键词：HC- SR04 module; sound speed measurement; time difference method; ultrasonic distance measurement module

摘要：提出了一种基于超声波测距模块HC-SR04的时差法测量声速的软硬件实现方法,并介绍了相应的硬件模块信号处理流程和测量程序运行流程。本方法可通过精确测量已知距离的声传播时间计算声速。利用所设计的实验装置,实际测量了空气中不同温度下多组声传播速度,测量结果与理论值的最大相对误差仅为0.6%,从而证明了本方法的可行性和合理性。与传统的共振干涉法、相位比较法等声速测量方法相比,本文方法具有实时性高、成本低、结构简单和精度高等优点。
This paper proposes a time- difference method based on HC- SR04, an ultrasonic ranging module, to measure acoustic velocity, and introduces the signal process hardware module and the measur- ing program running process. The proposed method can calculate the speed of sound by accurately measuring the acoustic propagation time at a known distance. In the experiment, the propagation speeds of ultrasonic waves at different temperatures were obtained through the devices designed for this study. The maximum relative error between the measured results and the theoretical value was only 0.6 %, which proved the feasibility and rationality of the proposed method. Compared with the traditional measuring methods such as resonance interferometry and phase - comparison method, the proposed one is of high real - time performance, low cost, simple structure, and high precision.