摘要
在光反馈自混合干涉位移测量中,为了在适度光反馈和弱光反馈机制下均能进行位移测量,提出了一种通用的位移测量算法。该算法通过自混合干涉信号的希尔伯特变换构造解析信号;由解析信号的包裹相位检测所有的整数干涉条纹,并确定对应的目标运动方向;再对所有干涉条纹赋值,插值平滑后重构出运动目标的位移轨迹。通过仿真和实验,验证了该位移测量算法的可行性。在光反馈自混合干涉位移测量系统中,该位移测量算法可以实时重构出运动目标的位移轨迹。
A universal algorithm is proposed in this paper for Optical feedback self-mixing interferometry（ OFSMI） displacement measurements, which gives reasonable results under both moderate and weak optical feedback conditions. This algorithm reconstruct displacement trajectory of a moving object by following processes： a） construct analytic signal by the OFSMI signal with the Hilbert transform; b） get all ure out movement directions of the target ; c） assign all the integer the integer fringes from the wrapped phase and figfringes and apply interpolation smoothing. The displacement measurement algorithm is evaluated by simulation and experimental results. As a consequence, the displacement trace of the moving object can be reconstructed in time using the sensing system.
出处
《激光杂志》
北大核心
2017年第1期55-59,共5页
Laser Journal
基金
河南省高等学校重点科研项目(15A5100013)
关键词
位移测量
光反馈自混合干涉
条纹检测
displacement measurement
optical feedback self-mixing interference
fringe detection
