Flexural transducer arrays for industrial non-contact applications
Flexural transducer arrays for industrial non-contact applications
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用于工业非接触式应用的弯曲传感器阵列
DOI：
10.1109/ultsym.2015.0047
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Dixon
中科院分区：
文献类型：
--
作者：
T. Eriksson;S. Ramadas;A. Unger;M. Hoffman;M. Kupnik;S. Dixon
提出了一种新的方法来构建强大的空气耦合弯曲超声阵列，并从原型换能器的结果。弯曲元件通过将挡板结构结合到金属片的背面而限定在单个金属片上。将压电元件直接附接到挡板中的孔的中心的金属板。目的是发现挡板是否可以充分地分离元件，使得每个元件表现得像半径等于挡板中的孔的半径的弯曲换能器。通过测量阵列的正面位移，可以表征各个元件的振动模式，并与单个元件换能器的振动模式进行比较。一般来说，挡板充分地分离了弯曲元件，使得观察到的振动模式对应于具有比挡板中的孔的半径大1.5mm的半径的边缘夹紧板的振动模式。这是一个小的偏移，这是通过与单个元件弯曲换能器相比，阵列元件的外边界定义得不太好来解释的。
A new method of constructing robust air-coupled flexural ultrasound arrays is suggested, and results from a prototype transducer are presented. The flexural elements are defined on a single sheet of metal by bonding a baffle structure to the back of the sheet. Piezoelectric elements were attached directly to the metal plate in the centre of the holes in the baffle. The aim was to find if the baffle could sufficiently separate the elements, such that each element behaved like a flexural transducer with radius equal to the radius of the holes in the baffle. By measuring the front face displacement of the array the vibration mode of individual elements could be characterised and compared to those of a single element transducer. In general the baffle sufficiently separated the flexural elements, such that the vibration modes observed corresponded to those of an edge clamped plate with a radius 1.5 mm larger than that of the holes in the baffle. This is a small shift, which is explained by the outer boundary being less well defined for the array elements, compared to a single element flexural transducer.