Engineering Research Equipment Grant: Acoustic Actuators for Quality Control in Manufacturing

工程研究设备补助金：用于制造质量控制的声学执行器

• 批准号: 8807661
• 负责人: Tribikram Kundu
• 金额: $ 7.9万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8807661&HistoricalAwards=false
• 关键词: Engineering; Research; Equipment; Grant; Acoustic

This research will investigate the use of using acoustic signals for quality control in the manufacturing of composites. Recent efforts in acoustic microscopy have been found to be very successful in studying near surface defects in a material. The acoustic material signature of a specimen (obtained using an acoustic microscope) is significantly affected by the surface roughness and near surface defects of a material. However, acoustic microscopes still lack the ability to correctly detect internal cracks or manufacturing defects within a material if these defects are at a depth of a few millimeters or greater from the surface. This is because the operating frequency (100 MHz. - 2 GHz.) of acoustic microscopes is too high for penetration into a material. In this research, an acoustic microscope operating at low frequency (0.1 to 3 MHz.) will be tested in the detection of internal cracks in a composite plate. Several modifications in the microscope design will be investigated to arrive at the best possible design.

本研究将调查使用声学 用于复合材料制造过程中质量控制的信号。 最近在声学显微镜方面的努力被发现是非常重要的。 成功地研究了材料中的近表面缺陷。 样品的声学材料特征（使用声学材料获得）可以是声学材料特征。 声学显微镜）是显着影响的表面 材料的粗糙度和近表面缺陷。 然而，在这方面， 声学显微镜仍然缺乏正确检测 材料内部裂纹或制造缺陷， 这些缺陷位于距离表面几毫米或更大的深度处 表面上 这是因为工作频率（100 MHz。- 2 GHz）。声学显微镜的反射率太高， 材料。 在这项研究中， 低频（0.1 ~ 3 MHz）将在检测中得到检验 复合板内部裂缝的证据 若干修改 在显微镜设计将进行调查，以达到 最好的设计