基于激光二极管光反馈效应的肌肉震颤测量系统

A Muscle Vibration Measurement System Based on Laser Diode Optical Feedback Effect

介绍一种测量肌肉震颤频率和幅度的无损伤、非接触光学方法。分析了在直接频率调制下 ,激光二极管中的光反馈效应 ,探讨了振动微小位移和速度的理论模型。设计并研制了一套基于光反馈效应的直接频率调制激光二极管光电探测系统。利用该系统对微弱机械振动信号进行了探测 ,表明该系统能用于肌肉震颤的测量。最后介绍了人体前臂内侧屈肌群紧张收缩时 。

A non invasive and non contact optical method to measure muscle vibration frequency and amplitude is introduced. By analyzing the direct frequency modulation and optical feedback effect of laser diode, a theoretical model for measuring small vibration displacement and velocity is discussed. An optoelectronic detection system based on the optical feedback effect in a direct frequency modulated laser diode is developed. Model experiments are carried out to measure the low frequency and weak mechanical vibration. Then human muscle vibrations of the forearm inner flexor cluster during tension contract are measured by the detection system. \{