The Electronic Speckle Pattern Interferometry (ESPI) optical technique is a full-filed and noncontact measurement system. It can measure the out-of-plane and in-plane deformation by static loading or dynamic vibration in real time. The ESPI technique based on the time-averaging method is especially useful for vibration measurement. The amplitude of vibration mode shape and the corresponding resonant frequency can be obtained at the same time. The self-arranged optical setup for the out-of-plane and in-plane vibration measurements by Amplitude Fluctuation - ESPI (AF-ESPI). In this setup, the in-plane and out-of-plane arrangements can be easily switched by blocking the laser beams of the undesired measurement direction.

Selected Journal Paper in this topic:

Yu-Hsi Huang, Chien-Ching Ma, Zheng-Zhi Li (2014, Jan). Investigations on Vibration Characteristics of Two-Layered Piezoceramic Disks. International Journal of Solids and Structures, vol 51, no. 1, pp. 227-251. (SCI).

Yu-Hsi Huang, Chien-Ching Ma, and Ching-Kong Chao, “High-frequency Resonant Characteristics of Triple-layered Piezoceramic Bimorphs Determined Using Experimental Measurements and Theoretical Analysis,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 6, pp.1219-1232. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma, “Experimental Measurements and Finite Element Analysis of the Coupled Vibrational Characteristics of Piezoelectric Shells,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 4，pp. 785-798. (SCI/EI)

Yu-Hsi Huang and Chien-Ching Ma, “Experimental and Numerical Investigations of Vibration Characteristics for Parallel-type and Series-type Triple layered Piezoceramic Bimorphs,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 56, no. 18, pp.2598-2611, 2009. (SCI/EI)