用于声波发射应用的压电晶圆活性传感器传感器
Connor Griffin1, Victor Giurgiutiu1
1Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA.
Sensors (Basel, Switzerland)
|August 26, 2023
概括
一种新的位捕获方法有效地验证了用于结构健康监测 (SHM) 的压电晶片活性传感器 (PWAS) 的质量. 这种方法可以检测传感器和粘合器的缺陷,并提供有关它们在SHM应用中的性能的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 结构健康监测 结构健康监测
背景情况:
- 压电材料在机械应力下产生电荷,使传感应用成为可能.
- 结构健康监测 (SHM) 使用传感器检测基础设施的损坏.
- 压电晶圆活性传感器 (PWAS) 越来越多地用于SHM.
研究的目的:
- 调查一种用于评估PWAS仪器质量的新音位捕捉方法.
- 分析PWAS缺陷及其粘合对传感器响应的影响.
- 让我们比较一下pitch-catch方法与电机阻抗 (EMI) 方法的缺陷检测.
主要方法:
- 开发并应用了一种pitch-catch方法来评估PWAS.
- 引入了PWAS和粘合层中的缺陷,以模拟现实世界的条件.
- 记录和分析传输和接收信号,以及阻抗光谱.
主要成果:
- 基准捕捉方法成功验证了无缺陷的PWAS仪器仪表和粘合.
- 缺陷的PWAS和粘合导致信号振幅降低和频谱变化.
- 调度捕捉方法确定了粘合缺陷 (消除高频) 和破损PWAS (600 kHz振幅增加) 的特定信号变化.
- 通过EMI方法,在粘合缺陷和破损传感器的阻抗峰值中显示出明显的变化.
结论:
- 位捕获方法是评估SHM中PWAS质量的可行技术.
- 传感器和粘接缺陷显著改变PWAS信号特征.
- 无论是pitch-catch还是EMI方法都能检测到PWAS缺陷,但具有不同的可观察签名.
更多相关视频
07:44Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
9.6K
10:39Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
6.9K
相关概念视频
01:21Gas Chromatography: Types of Detectors-I
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
01:14Clamper Circuit
A clamper circuit, also known as a DC restorer, represents a specialized variant of the rectifier circuit, notable for its method of taking the output across the diode rather than the capacitor. This configuration lends to several distinctive applications, particularly in handling square wave inputs.
Within this circuit, the diode's orientation prompts the capacitor to charge up to the level of the most negative peak of the input signal. Upon reaching this state, the diode ceases to conduct,...
Within this circuit, the diode's orientation prompts the capacitor to charge up to the level of the most negative peak of the input signal. Upon reaching this state, the diode ceases to conduct,...
01:29Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...