| 基于TDC的表面波压力测量系统 |
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| 引用本文： | 凌张伟,张宏建,贺庆. 基于TDC的表面波压力测量系统[J]. 电子测量与仪器学报, 2008, 22(3) |
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| 作者姓名： | 凌张伟 张宏建 贺庆 |
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| 作者单位： | 浙江大学工业控制技术国家重点实验室自动化仪表研究所,杭州,310027 |
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| 摘 要： | 基于表面波的压力无损测量方法要求精确地测量表面波在介质中的传播时间.针对参比式和计算修正式压力测量方法,本文开发了一套双路可循环超声波压力测量系统.该系统既可以使用回振法测量超声波传播时间,又可以同时测量两路超声波的时间差.实验结果表明,该系统用于时间测量时均方根误差为0.0077ns,用于参比式压力测量时最大绝对误差不大于0.07MPa,用于计算修正式压力测量时最大绝对误差不大于0.12MPa,达到了较高的精度.
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| 关 键 词： | 表面波 传播时间 压力 测量系统 |
Pressure Measurement System Using Surface Wave Based on TDC |
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| Ling Zhangwei,Zhang Hongjian,He Qing. Pressure Measurement System Using Surface Wave Based on TDC[J]. Journal of Electronic Measurement and Instrument, 2008, 22(3) |
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| Authors: | Ling Zhangwei Zhang Hongjian He Qing |
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| Affiliation: | Ling Zhangwei Zhang Hongjian He Qing(State Key Laboratory of Industrial Control Technology,Institute of Automation Instrumentation,Zhejiang University,Hangzhou,310027,China) |
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| Abstract: | Nondestructive pressure measurement based on surface wave usually requests accurate measurement of propagation time of surface wave in the medium.A dual sing-around measurement system was developed aiming at the reference type and calculation modifying pressure type measurement methods.Using this system,not only the propagation time of surface wave can be measured using sing-around method,but also the propagation time difference between two surface waves can also be detected.Experiment results show that the... |
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| Keywords: | surface wave propagation time pressure measurement system. |
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