| 基于ARM的嵌入式超声传播时间测量装置 |
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| 引用本文： | 樊永顺,贺庆,戴凤智.基于ARM的嵌入式超声传播时间测量装置[J].应用声学,2015,23(2). |
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| 作者姓名： | 樊永顺 贺庆 戴凤智 |
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| 作者单位： | 天津科技大学 电子信息与自动化学院,天津科技大学 电子信息与自动化学院,天津科技大学 电子信息与自动化学院 |
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| 基金项目： | 国家自然基金(61301246)；天津市高等学校科技发展基金计划项目(20120831)；天津市高校优秀青年教师资助计划项目(00015)；天津科技大学科学研究项目基金(20120103) |
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| 摘 要： | 应用超声波检测技术进行检测时,通常需对超声波在介质中的传播时间进行精准的测量,为精准测量超声波的传播时间,设计了一套基于ARM的嵌入式超声传播时间测量装置。该装置电路运行稳定,成本低廉,采用多次测量结果取算数平均值的方法以减小随机干扰,采用参比方法放置接收探头以消减电路中电子器件的延时。通过对实验结果进行分析,得出该装置可精准测量超声波在实验试块中的传播时间且满足设计要求,分辨率可达一纳秒。
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| 关 键 词： | 超声波 传播时间测量 无损检测 嵌入式系统 |
Embedded device for measurement of ultrasonic transmission time based on ARM |
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| Institution: | College of Electronic Information and Automation, Tianjin University of Science and Technology Tianjin,,College of Electronic Information and Automation, Tianjin University of Science and Technology Tianjin |
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| Abstract: | Applying the ultrasonic testing technique usually requires precise measurements of the ultrasonic transmission time in the medium. In order to measure the transmission time accurately, an embedded device for measurement of ultrasonic transmission time based on ARM was developed. The circuit of device is stable and the price is low. The averaging value from repeated measurements was adopted to reduce the random noise. The reference method to place the receiver probes eliminated the delay of electronic device in the circuit. The results of experiment show that the device can accurately measure the ultrasonic transmission time in the experimental material and can reach designing requirements. Its resolution can up to 1ns. |
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| Keywords: | Ultrasonic wave Measurement of transmission time Nondestructive testing Embedded system |
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