• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (24): 18-26.doi: 10.3901/JME.2018.24.018

• 仪器科学与技术 • 上一篇    下一篇

GH4169晶粒尺寸的多参数超声评价方法

陈昊1, 董金龙1, 陈曦1,2, 邬冠华1, 周正干2   

  1. 1. 南昌航空大学无损检测技术教育部重点实验室 南昌 330063;
    2. 北京航空航天大学机械工程及自动化学院 北京 100191
  • 收稿日期:2018-01-30 修回日期:2018-07-02 出版日期:2018-12-20 发布日期:2018-12-20
  • 通讯作者: 陈曦(通信作者),女,1982年出生,博士研究生,讲师。主要研究方向为电磁与声学检测技术、无损检测智能化。E-mail:chenxi4645@nchu.edu.cn
  • 作者简介:陈昊,男,1982年出生,博士,副教授,硕士研究生导师。主要研究方向为智能计算理论与应用、人工智能与模式识别、无损检测智能化。E-mail:chenhaoshl@nchu.edu.cn;董金龙,男,1991年出生,硕士研究生。主要研究方向为智能计算理论与应用、无损检测智能化。E-mail:dongjinglong_edu@163.com
  • 基金资助:
    国家自然科学基金(61772255,61440049)、江西省创新驱动“5511”工程优势学科创新团队(20165BCB19007)、江西省优势科技创新团队计划(20152BCB24004)、无损检测技术教育部重点实验室(南昌航空大学)开放基金(ZD201529004)、江西省科技厅科技(20161BBG70047,20161BAB202038)、江西省教育厅科技(GJJ150716)和江西省图像处理与模式识别重点实验室开放基金(ET201604246)资助项目。

Novel Multi-parameter Ultrasonic Evaluation Method for GH4169 Grain Size

CHEN Hao1, DONG Jinlong1, CHEN Xi1,2, WU Guanhua1, ZHOU Zhenggan2   

  1. 1. Key Laboratory of Nondestructive Test of Ministry of Education, Nanchang Hangkong University, Nanchang 330063;
    2. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191
  • Received:2018-01-30 Revised:2018-07-02 Online:2018-12-20 Published:2018-12-20

摘要: 考虑到单个超声响应特性参数反应出晶粒尺寸的特征信息不够全面,提出将多个超声参数相结合,构建面向GH4169晶粒尺寸无损定量表征的多参数超声评价方法。依据相关性度量准则,从声速、衰减系数、非线性系数等8个超声参数中选取有效参数;构建二次多项式的映射模型,将选取的多维参数降成单维参数并进行量纲一化处理;在对单维参数与晶粒尺寸拟合过程中,构建以两者平均绝对误差最小为目标的优化问题并结合进化算法进行求解,寻找最佳的映射函数和拟合函数系数;最终建立多参数超声评价模型。经测试样本验证表明,与单一参数的声速法模型、衰减系数法模型和背散射EMD法模型相比,所建模型评价结果精度高,性能稳定、误差小且有着良好的评价效应;融合了多个超声检测参数而保留了对晶粒尺寸的响应信息,提高了测量精度和抗干扰能力。

关键词: 超声评价, 多参数, 进化算法, 晶粒尺寸, 映射模型

Abstract: Considering that the characteristic information of grain size that reflects from single ultrasonic response characteristic parameter is not comprehensive enough, a combination of multiple ultrasonic parameters is proposed to construct a multi-parameter ultrasonic evaluation method for the non-destructive quantitative characterization of the grain size of GH4169. According to the correlation metric, the effective parameters are selected from 8 ultrasonic parameters, such as sound velocity, attenuation coefficient and nonlinear coefficient. A quadratic polynomial mapping model is constructed to reduce the selected multidimensional parameters to single-dimensional parameters and normalizing. In the process of fitting single-dimensional parameters and grain size, an optimization problem aiming at minimizing the average absolute error between them is constructed and solved by evolutionary algorithm to find the best mapping function and fitting function coefficient. Finally, a multi-parameter ultrasonic evaluation model is given. Compared with single-parameter sound velocity model, attenuation coefficient model and backscattering EMD model, the test results show that the model evaluation results have high accuracy, stable performance, small error and good evaluation effect. Due to the integration of multiple ultrasonic detection parameters, the response information to the grain size is retained, thereby improving the measurement accuracy and anti-interference ability.

Key words: evolutionary algorithm, grain size, mapping model, multi-parameter, ultrasonic evaluation

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