Abstract

The results of studies on the use of the impact echo method for thickness gaging of compact concrete building structures are presented. It is shown that in compact building structures, in which the thickness being measured is comparable with other sizes of the test object, it is impossible to determine the sought-for thickness of the product based on its own resonant frequency due to the geometric dispersion of speed of sound. The influence of geometric dispersion is different for each compact product, and, as a result, it is necessary to measure the correction factor of the geometric dispersion of speed of sound \(\beta \) individually for each compact product. A technique is proposed for determining the factor \(\beta \) in compact products that ensures both the determination of the fundamental resonance frequency and the elimination of the influence of the geometric dispersion of speed of sound on the accuracy of thickness gaging of compact objects.

中文翻译：

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确定紧凑型混凝土制品中声速的几何色散校正因子的程序

摘要

介绍了使用冲击回波法进行紧凑型混凝土建筑结构厚度测量的研究结果。结果表明，在紧凑的建筑结构中，所测量的厚度可与其他尺寸的测试对象相媲美，由于其几何分散性，不可能根据其自身的共振频率来确定所需的产品厚度。声音的速度。对于每个紧凑型产品，几何色散的影响是不同的，因此，有必要针对每个紧凑型产品分别测量声速\（\ beta \）的几何色散的校正因子。提出了一种确定因子\（\ beta \）的技术 在紧凑型产品中，它既可以确定基本共振频率，又可以消除声速的几何色散对紧凑型物体的厚度测量精度的影响。