| 魏文卿,张媛媛,徐涛,刘红,伍凡.超声水浸法高精度测量玻璃材料声速的研究[J].声学技术,2020,39(6):693~696 |
| 超声水浸法高精度测量玻璃材料声速的研究 |
| Research on high precision sound velocity measurement of glass materials by ultrasonic water immersion method |
| 投稿时间：2019-12-18 修订日期：2020-02-18 |
| DOI：10.16300/j.cnki.1000-3630.2020.06.007 |
| 中文关键词: 脉冲反射法 超声水浸 时间间隔 超低膨胀玻璃 声速 |
| 英文关键词: pulse reflection method ultrasonic water immersion time interval ultra-low expansion glass sound velocity |
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| 摘要点击次数: 645 |
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| 中文摘要: |
| 材料的声速与其杨氏模量和密度有关,通过测量材料的声速可以评价材料的特性。相关研究表明,超低膨胀玻璃的声速是评价其热膨胀系数的关键参数,通过测量声速可以实现对超低膨胀玻璃热膨胀系数的间接无损测量。针对市售的超声声速测量仪器存在系统复杂且不易集成化的问题,结合高精度的数据采集卡设计了超声信号采集显示软件,并基于超声水浸脉冲反射法搭建了高精度的声速测量系统,系统结构简单,操作方便且较易集成化。采用该测量系统对制备的超低膨胀玻璃样品的声速进行了测量,结果表明该系统具有较高的声速测量分辨率,声速分辨率可达为0.2 m.s-1,为使用超声声速法高精度测量超低膨胀玻璃的热膨胀系数奠定了研究基础。 |
| 英文摘要: |
| The sound velocity of materials is related to its Young's modulus and density, and the properties of materials can be evaluated by measuring the sound velocity of materials. Relevant researches show that the sound velocity of ultra-low expansion glass is the key parameter to evaluate its thermal expansion coefficient, and therefore the indirect nondestructive measurement of thermal expansion coefficient of ultra-low expansion glass can be realized by measuring its sound velocity. Considering that the ultrasonic velocity measuring instruments on the market are complex and difficult to integrate, an ultrasonic signal acquisition and display software is designed by combining high-precision data acquisition card, then a high-precision sound velocity measurement system with simple structure, convenient operation and easy integration is built based on the ultrasonic water immersion pulse reflection method. Finally, the sound velocity of the prepared ultra-low expansion glass samples are measured, and the result shows that the measurement system has high sound velocity resolution of 0.2 m.s-1, which lays a research foundation for measuring the thermal expansion coefficient of ultra-low expansion glass via the high precision measurement of its ultrasonic velocity |
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