作者：李力, 姜恺, 曾德学
作者单位：水电机械设备设计与维护湖北省重点实验室(三峡大学), 湖北 宜昌 443002
关键词：超声检测; 液浸法; 探头选择; 多元高斯模型; 近场区长度
摘要：
针对使用液浸法超声检测时无行业标准指导其探头参数选择的问题,提出一种基于近场区长度的探头选择方法。该方法运用多元高斯模型计算介质中的声压分布,确定探头近场区长度,然后通过近场区与检测对象位置关系选择最佳探头参数。缺陷回波仿真实验结果表明:该探头选择方法是有效的,有助于提高液浸法超声检测的准确度。
Research on transducer parameters selection for ultrasonic immersion method
LI Li, JIANG Kai, ZENG Dexue
Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Yichang 443002, China
Abstract: When using the contact method, testing persons can select the suitable probe parameters according to the industry standard. But, when using the immersion method,there isn't a scientific basis. This paper proposed a selection method for probe parameters based on near-zone length. Firstly, this method calculates the sound pressure distribution in the medium by the multi-Gaussian beam model. Then, it selects the suitable probe parameters according to the position relations between near zone length and detection object. By the flaw echoes,it shows that the probe selection method is effective and it can improve the accuracy to the ultrasonic immersion method.
Keywords: ultrasonic testing; immersion method; probe selection; multi-Gaussian beam model; near-zone length
2015, 41(1): 71-73,92 收稿日期: 2014-1-12;收到修改稿日期: 2014-3-6
基金项目: 三峡大学2013年研究生科研创新基金项目(2013CX035)
作者简介: 李力(1964-),女,湖南汨罗市人,教授,博士,研究方向机械监测、控制与诊断,机械信号分析与处理,无损检测技术等。
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