[1]于永洁,杜昱錡,黄仕磊,等.基于背衬层匹配的压电式柔性超声传感器优化[J].郑州大学学报(工学版),2024,45(pre):2.[doi:10. 13705 / j. issn. 1671-6833. 2025. 01. 006]
　YU Yongjie,DU Yuqi,HUANG Shilei,et al.Optimization of Piezoelectric Flexible Ultrasonic Sensors Based on Backing Layer Matching[J].Journal of Zhengzhou University (Engineering Science),2024,45(pre):2.[doi:10. 13705 / j. issn. 1671-6833. 2025. 01. 006]
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基于背衬层匹配的压电式柔性超声传感器优化()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年pre
页码:
2
栏目:
出版日期:
2024-12-31

文章信息/Info

Title:
Optimization of Piezoelectric Flexible Ultrasonic Sensors Based on Backing Layer Matching
作者:
于永洁; 杜昱錡; 黄仕磊; 甘芳吉
(四川大学 机械工程学院,四川 成都610000)
Author(s):
YU Yongjie; DU Yuqi; HUANG Shilei; GAN Fangji
关键词:
柔性超声传感器; 背衬层匹配; 阻抗匹配; 信噪比
Keywords:
Flexible ultrasonic transducers;  Backing layer matching;  Impedance matching;  Signal-to-noise ratio
分类号:
TP212；TH89
DOI:
10. 13705 / j. issn. 1671-6833. 2025. 01. 006
文献标志码:
A
摘要:
基于聚偏氟乙烯（PVDF）压电薄膜的柔性超声传感器具有易于矩阵化、体积小、质量轻、盲区小等优点，但容易受到背部杂波干扰和阻抗不匹配的影响，导致回波信号频率成分复杂且信噪比较低。为有效吸收传感器背部杂波，提升声能单向辐射的能力，提出利用钨粉和硅胶设计针对柔性超声传感器的背衬层，在保持传感器整体柔性的同时使传感器的信号幅值提高了300 %。其次，根据柔性超声传感器的电学特性提出了柔性超声传感器阻抗匹配优化方法，并通过梯度实验获得最佳匹配参数，使传感器的信噪比从2 dB提高到30 dB。优化后的柔性超声传感器具有宽频带、高频率、窄脉冲的优良性能，对不同曲率、不同壁厚的管道试件厚度测量实验结果表明其可以达到0.01 mm的精度。
Abstract:
Flexible ultrasound transducers based on polyvinylidene fluoride (PVDF) piezoelectric film have the advantages of easy matrixing, small size, light weight, and small blind area, but are susceptible to back clutter interference and impedance mismatch, resulting in a complex frequency component of the return signal and a low signal-to-noise ratio. In order to effectively absorb the stray waves at the back of the transducer and improve the ability of unidirectional radiation of acoustic energy, it is proposed to use tungsten powder and silica gel to design the backing layer for flexible ultrasonic transducers, which increases the signal amplitude of the transducer by 300 % while maintaining the overall flexibility of the transducer. Secondly, according to the electrical characteristics of the flexible ultrasonic transducer impedance matching optimization method for flexible ultrasonic transducers is proposed, and the best matching parameters are obtained through gradient experiments, so that the signal-to-noise ratio of the transducer is increased from 2 dB to 30 dB. optimized flexible ultrasonic transducers have the excellent performance of wide bandwidth, high frequency, narrow pulse, and the experimental results of the measurement of the thickness of pipe test specimens with different curvatures and wall thicknesses show that it can reach the accuracy of 0.01 mm.

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更新日期/Last Update: 2024-10-10