公开(公告)号：WO2017124188A1

公开(公告)日：2017-07-27

申请号：PCT/CA2017/050058

申请日：2017-01-18

申请人： BRITISH COLUMBIA INSTITUTE OF TECHNOLOGY

发明人： COX, Neil ,  BOOTH, James ,  BRZEV, Svetlana ,  KENNEDY, Diane ,  MCEWEN, Bill

IPC分类号： G01N3/30

CPC分类号： G01N29/46 ,  G01N3/30 ,  G01N29/045 ,  G01N29/11 ,  G01N29/4436 ,  G01N2291/02827

摘要： A method and apparatus for determining the compressive strength of masonry units based on airborne sonic signals generated by stimulating the samples with short duration, mechanical impulses are described. The non-destructive testing apparatus consists of a specimen support unit which mechanically isolates the masonry unit from the environment and from the support, a mechanical stimulator, and an acoustic response detector. The signals recorded are analyzed to extract the pertinent features which are then used to compute the compressive strength of the sample. The pertinent signals are deduced through a calibration of the masonry type being analyzed (material and shape) based on physical analysis of the sample's normal modes of vibration, or through Finite Element Analysis of the vibrations, or through direct empirical calibration. This non-destructive testing method is low-cost, readily implemented and provides a reliable technique for compressive strength estimation.

摘要翻译： 描述了一种用于基于通过以短持续时间，机械脉冲来刺激样品产生的空中声波信号来确定砌体单元的压缩强度的方法和设备。 无损检测设备由样品支撑单元组成，该单元将砌体单元与环境和支撑物机械隔离，机械刺激器和声学响应检测器。 分析记录的信号以提取相关特征，然后用它们计算样品的抗压强度。 相关信号通过基于样品正常振动模式的物理分析或通过振动的有限元分析或通过直接经验校准，通过对所分析的砌体类型（材料和形状）进行校准来推导出。 这种非破坏性的测试方法成本低廉，易于实施，并为压缩强度评估提供了可靠的技术。