An Optically Driven Microgripper Based on Photostrictive Materials

Abstract

Abstract:

Abstract： The microgripper is widely used in microassembly and microoperation application. Aiming at the problem of the existent microgripper, an optical microgripper based on the PLZT bimorph cantilever structure was presented. As the core component of optical microgripper, the photostrictive effect of PLZT ceramic was studied and a novel photostrictive mathematical model was established. Besides, the drive characteristic of PLZT bimorph was derived. Furthermore, the flexible hinged magnifying mechanism was designed and the theoretical calculation of the loading capacity of flexure hinge was conducted. The calculation results show that the carrying capacity of flexure hinges can meet the operating requirements. The optical microgripper can provide wireless remote optically control without electromagnetic disturbance and can pick and place controlled by the illumination. A displacement amplification of 24 and a maximum stroke of 3.880 mm are achieved, which can satisfy the operating requirement of most microobjects.

Key words: photostrictive material, microgripper, opticallydriven, mathematical model

CLC Number:

TP 241.3

HUANG Jiahan,WANG xinjie,WANG Jiong. An Optically Driven Microgripper Based on Photostrictive Materials[J]. Journal of Shanghai Jiaotong University, 2014, 48(12): 1681-1687.

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