基于光致形变材料的光驱动微夹钳

摘要/Abstract

摘要：

摘要：针对目前微夹钳存在的一些问题，提出了一种基于光致形变材料镧改性锆钛酸铅(PLZT)双晶片的光驱动微夹钳.首先对光微夹钳中的核心部件PLZT陶瓷的光致形变特性进行了研究，建立了PLZT陶瓷的新型光致伸缩模型；其次对PLZT双晶片式悬臂梁结构的驱动特性进行了分析；最后对柔性铰链放大结构进行了设计，并对其柔性铰链的承载能力进行了理论计算.计算结果表明，柔性铰链的承载能力满足使用要求，光微夹钳可实现远程光控而不受电磁干扰，可自主控制夹持与释放动作，其放大机构的放大倍数为24倍，且最大钳口距离可达3.880 mm，基本满足大部分微型零件的操作需求，具有很好的通用性和适用性.

关键词: 光致形变材料, 微夹钳, 光驱动, 数学模型

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

中图分类号:

TP 241.3

黄家瀚，王新杰，王炅. 基于光致形变材料的光驱动微夹钳[J]. 上海交通大学学报（自然版）, 2014, 48(12): 1681-1687.

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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