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首页> 外文期刊>International journal of applied mechanics >Application of Electronic Speckle Pattern Shearing Interferometry with High-Speed Camera in Vibration Analysis of Piezoelectric Transducer
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Application of Electronic Speckle Pattern Shearing Interferometry with High-Speed Camera in Vibration Analysis of Piezoelectric Transducer

机译：电子散斑图案剪切干涉法在压电传感器振动分析中的高速相机应用

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摘要

Electronic speckle pattern shearing interferometry, also known as shearography, is a highly sensitive technique that can measure the distribution of the displacement derivatives of the object surface. This method has also been used to describe the mode shapes of vibrating objects. In the current research, electronic speckle pattern shearing interferometry with high-speed camera was proposed for full-field measurement of the derivative of the vibration amplitude. One of the important limitations of time-average shearography is that this method is only able to provide the qualitative measurement of vibration amplitude. Stroboscopic shearography also has an inevitable limitation on the measurement of vibration amplitude at frequencies lower than 50 Hz. To study the performance of shearography with high-speed camera, the research concerned the low-frequency vibration of a piezoelectric transducer during its operation. The proposed method overcomes the limitations of conventional shearography methods in quantitative measurement of vibration amplitude at low frequencies. Laser Doppler vibrometry (LDV) method was used to verify the measurement results of shearography with high-speed camera. The obtained results indicated good agreement between both shearography with high-speed camera and LDV methods. However, due to the rigid body motion of the piezoelectric transducer, LDV results generally represented more values for the maximum amplitude.
机译：电子散斑图案剪切干涉测量法，也称为Shearography是一种高度敏感的技术，可以测量物体表面的位移衍生物的分布。该方法还用于描述振动物体的模式形状。在目前的研究中，提出了具有高速摄像机的电子散斑图案剪切干涉测量法，用于振动幅度的衍生物的全场测量。时间平均分子拍摄的一个重要局限性是该方法仅能够提供振动幅度的定性测量。频闪性沉积型在低于50Hz的频率下的振动幅度的测量也具有不可避免的限制。为了研究沉焦与高速相机的性能，研究涉及压电传感器在运行过程中的低频振动。所提出的方法克服了在低频下定量测量振动幅度的常规剪切方法的局限性。使用激光多普勒振动器（LDV）方法用于验证具有高速摄像头的剪切术的测量结果。所获得的结果表明，两者之间的良好协议与高速摄像头和LDV方法之间。然而，由于压电换能器的刚体运动，LDV结果通常表示最大幅度的更多值。

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