Design of an Orthotropic Piezoelectric Composite Material Phased Array Transducer for Damage Detection in a Concrete Structure
Design of an Orthotropic Piezoelectric Composite Material Phased Array Transducer for Damage Detection in a Concrete Structure
复制标题
DOI：
10.1080/09349847.2015.1122129
复制
发表时间：
2016-01
影响因子：
1.4
通讯作者：
Ziping Wang;Ying Luo;Guoqi Zhao;Bai-qiang Xu;F. Yuan
中科院分区：
文献类型：
--
作者：
Ziping Wang;Ying Luo;Guoqi Zhao;Bai-qiang Xu;F. Yuan
为了验证传感器在复杂混凝土材料中应用的可行性和有效性，研究了超声相控阵检测在混凝土结构中的创新应用。与传统的压电复合材料相比，正交各向异性压电复合材料（OPCM）由于其高灵敏度和沿极化方向的指向性，在损伤检测中具有明显的优势。研究了一种由16个OPCM元件组成的低频超声相控阵换能器。通过研究混凝土结构中各参数在焦点处的总位移变化，得到相控阵单元间距、阵元宽度、阵元个数等最优阵列参数。这种结构允许在测量过程中对混凝土结构中的波场指向性进行变化和控制。采用精密延时装置对混凝土试件进行测量。将实验测量结果与理论计算结果进行了比较，探讨了不同阵列元素参数对测量结果的影响。结果表明，OPCM相控阵传感器可用于混凝土块体损伤检测。
ABSTRACT In order to verify the feasibility and effectiveness of the sensor used in complex concrete materials, an innovative application of ultrasonic phased array detection for a concrete structure was investigated. Comparing with the traditional piezoelectric composites, orthotropic piezoelectric composite material (OPCM) can be used as transducers in damage detection show clear advantages because of their high sensitivity and directivity along the polarization direction. A low frequency ultrasonic phased array transducer consisting of 16 OPCM elements is studied. The optimal array parameters, such as the phased array element interval, the array element width, and number of elements, are obtained by studying the total displacement changes as various parameters change at the focus point in the concrete structure. This configuration allowed the variation and control of the wave field directivity in the concrete structure during the measurements. The measurements were taken on concrete specimens using a precise time-delay device. The experimental measurements were compared to theoretical calculations to investigate the influence of different array element parameters. The results show that an OPCM phased array transducer can be used to detect damage in a concrete block.