Aiming at problem of how to find target components quickly and accurately in microscopic field in micro-assembly

and obtain global visual information of target components

micro-assembly component search mechanism based on micro-visual magnification switching is presented. Analyze on how to determine automatic search step size. Discuss on principle and process of automatic search strategy. By automatically scanning target plane

micro-components within target plane are accurately identified

effectively overcome limitation that the micro-visual range in a wide range of micro-assembly is much less than limitation of operating domain

guarantee that the micro-assembly components target has always been presented in different micro-magnification field of view

which lay a visual basis for further operation for the micro-assembly robot. The experimental results show that the searching successful rate of the search method is 95 % and the average search time is 28 s.