Improved transition detection algorithm for a self-mixing displacement sensor

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• 作者：Chunlei Jiang^a ; ^b ; Chengwei Li^a ; ^{lichengwei_hit@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yuan Wang^b
• 关键词：Self-mixing interference ; Displacement measurement ; Laser sensor ; Phase unwrapping
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：127
• 期：14
• 页码：5603-5612
• 全文大小：2765 K

文摘

An improved transition detection algorithm for a self-mixing interference (SMI) laser sensor is presented in this study. The proposed algorithm can correctly identify extreme points of SMI and can quickly and accurately locate determination thresholds, thus it can effectively reduce positioning deviation. The SMI laser sensor enables accurate reconstruction of the displacement information from a SMI signal. Displacement reconstructions performed by improved transition detection algorithm have been validated through simulations and experiments.