Application of New Flexible Piezoelectric Film in Pipeline Leakage Monitoringand Identification

HE Jialin; MA Denglong; QIN Rongzhuo; ZHANG Guangsen; XIE Yunchuan; GAO Jianmin; ZHANG Zaoxiao

doi:10.7652/xjtuxb202302019

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Application of New Flexible Piezoelectric Film in Pipeline Leakage Monitoringand Identification

更新时间：2025-07-09

- Application of New Flexible Piezoelectric Film in Pipeline Leakage Monitoringand Identification
- Vol. 57, Issue 2, Pages: 184-191(2023)
- 作者机构：
  
  1. 西安交通大学机械工程学院,西安,710049
  2. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
  3. 西安交通大学化学学院,西安,710049
  4. 西安交通大学化学工程与技术学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202302019
  CLC： TH866
- Online First：10 February 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
HE Jialin, MA Denglong, QIN Rongzhuo, et al. Application of New Flexible Piezoelectric Film in Pipeline Leakage Monitoringand Identification[J]. 2023, 57(2): 184-191.
DOI：

HE Jialin, MA Denglong, QIN Rongzhuo, et al. Application of New Flexible Piezoelectric Film in Pipeline Leakage Monitoringand Identification[J]. 2023, 57(2): 184-191. DOI： 10.7652/xjtuxb202302019.

摘要

针对传统固体压电陶瓷式压电探头安装结构复杂、响应频率范围窄、对于复杂曲面不适应等缺点导致的在管道泄漏检测中灵敏度不高、检测范围较近等问题

提出一种采用新型柔性压电薄膜作为声发射传感器的管道泄漏检测方法。首先

将偏氟乙烯-三氟乙烯共聚物P(VDF-TrFE)高分子柔性压电薄膜与传统压电陶瓷式、空气耦合式3种传感器布置于管道表面; 然后

采用软硬件结合的方式采集不同状态下的管道壁面信号; 最后

通过FFT等时频域信号处理算法对采集信号进行分析处理

通过时域和频域波形特征判断管道泄漏状态。实验结果表明:在泄漏信号响应方面

新型P(VDF-TrFE)柔性压电薄膜相比传统压电陶瓷式传感器表现出了更高的灵敏度和更大的响应值

能够检测出更小的泄漏

且该类型传感器受安装以及位置角度的限制较小; 随着泄漏源距离的增加

P(VDF-TrFE)柔性压电传感器的衰减程度较压电陶瓷和空气耦合式传感器低

能够检测出更远距离的泄漏; P(VDF-TrFE)柔性压电传感器能够作为一种新型的声发射传感器应用于地埋管道泄漏等复杂结构损伤失效检测中

具有重要的研究意义和应用价值。

Abstract

The complex installation structure

narrow response frequency range

and inadaptability to complex curved surfaces of traditional solid piezoelectric ceramic piezoelectric probes usually result in low sensitivity and small detection range in pipeline leakage detection. To address these problems

a pipeline leakage detection method using a new flexible piezoelectric film as an acoustic emission sensor is proposed. Firstly

the flexible polymer piezoelectric film of vinylidene fluoride trifluoro ethylene copolymer(P(VDF-TrFE))

a traditional piezoelectric ceramic sensor

and an air coupling sensor are arranged on the pipe surface. After that

signals from pipe wall surface under various conditions are collected by software and hardware combination. At the end

the collected signals are analyzed and processed by FFT equal time and frequency domain signal processing algorithm so that pipeline leakage can be identified according to the waveform characteristics in time and frequency domain. The experimental results show that in terms of leakage signal response

the new P(VDF-TrFE)flexible piezoelectric film yields higher sensitivity and larger response value than the traditional piezoelectric ceramic sensor

and it is capable of identifying smaller leakage. In addition

it is less limited in installation and position angle. Also

the attenuation of P(VDF-TrFE)flexible piezoelectric sensor is lower than that of piezoelectric ceramic and air coupled sensor as the distance increases

thus enabling detection of leakage from a farther source. As a new type of acoustic emission sensor

P(VDF-TrFE)flexible piezoelectric sensor is applicable to failure detection of complex structures like buried pipeline. Therefore

it has important research significance and application value.

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references

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