...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Nondestructive Evaluation >Crack Detection in Concrete Parts Using Vibrothermography
【24h】

Crack Detection in Concrete Parts Using Vibrothermography

机译：使用vibrothotmography在混凝土零件中的裂纹检测

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study investigates the use of vibrothermography to detect cracks in concrete parts, developing acoustic excitation devices (sonic and ultrasonic and low- and high-power excitation devices) and examining the influences of excitation frequency, power, and pressure on the ability to detect cracks. Experimental results demonstrate that this inspection technique can suitably detect concrete cracks: Ultrasound at frequencies from 20 to 100kHz could be used to excite concrete cracks with notable temperature rise; coarse aggregates in concrete do not interfere with the ability to detect cracks; high-power ultrasound enhances crack detection though intense scattering of attenuation that could be induced by coarse aggregates. Moreover, the stimulus horn designed as part of this study can input ultrasound at high power into concrete parts without damaging the contact surface, while the custom-made pressure loading sleeve can steadily exert force on the transducer during excitation; the optimal force exerted on KMD ultrasonic transducers with a rated power of 50W is 1500N, which can make the transducer output enough power to detect cracks.
机译：本研究调查了vibrothotmography的使用来检测混凝土零件中的裂缝，显影声学激励装置（Sonic和超声波和低功率激励装置）并检查激发频率，功率和压力对检测裂缝的能力的影响。实验结果表明，该检测技术可以适当地检测混凝土裂缝：在20至100kHz的频率下超声波可用于激发混凝土裂缝，以显着的温度升高;混凝土中的粗聚集不会干扰检测裂缝的能力;高功率超声增强裂纹检测，但粗料可以诱导的衰减散射散射。此外，作为本研究的一部分设计的刺激喇叭可以在不损坏接触表面的情况下将超声波输入混凝土部分，而定制的压力负载套筒在激励过程中可以稳定地施加在换能器上;施加在KMD超声波换能器的最佳力，具有50W的额定功率为1500N，可以使换能器输出足够的功率以检测裂缝。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号