High Precision Ultrasonic Testing Method for Density of Engineering Plastics

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Chenggang Li, Lun Wang, Lihong Sun, Zhaojie Chu, Wei Liu, Jiagui Tao
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Abstract

The density of engineering plastics is a key parameter for ensuring their safety and reliability. In order to achieve rapid and high-precision on-site detection, a method based on the acoustic pressure reflection coefficient is proposed. First, finite element simulation analysis was conducted to obtain the acoustic field distribution during ultrasound propagation under water immersion conditions. The correlation between interface echo intensity and material density was determined. Optimal detection parameters were designed to reduce measurement errors caused by beam overlap and diffusion attenuation. A water immersion ultrasonic experimental system was constructed, and the measurement accuracy of the method was tested using chlorinated polyvinyl chloride pipes. The results show that, compared to the measurement results of the Archimedean drainage method, the maximum error of ultrasonic measurements does not exceed 1.7%, and the overall variance is less than 1.2%. The measurement accuracy of this method is compared with the regression results of different machine learning models. It is demonstrated that, compared to regression methods based on variable correlation, this method retains the advantages of high efficiency and low cost in ultrasonic density measurement, while achieving higher measurement accuracy. Additionally, it does not require a dataset for training support, making it promising and valuable for practical applications.

Abstract Image

工程塑料密度的高精度超声波测试法
摘要 工程塑料的密度是确保其安全性和可靠性的关键参数。为了实现快速、高精度的现场检测,本文提出了一种基于声压反射系数的方法。首先,通过有限元模拟分析获得了超声波在浸水条件下传播时的声场分布。确定了界面回声强度与材料密度之间的相关性。设计了最佳检测参数,以减少由波束重叠和扩散衰减引起的测量误差。构建了水浸超声波实验系统,并使用氯化聚氯乙烯管道测试了该方法的测量精度。结果表明,与阿基米德排水法的测量结果相比,超声波测量的最大误差不超过 1.7%,总体方差小于 1.2%。该方法的测量精度与不同机器学习模型的回归结果进行了比较。结果表明,与基于变量相关性的回归方法相比,该方法既保留了超声波密度测量的高效率和低成本优势,又实现了更高的测量精度。此外,该方法不需要数据集的训练支持,因此在实际应用中具有广阔的前景和价值。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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