Laser self-mixing interference correlation speed measuring device and method

The invention discloses a laser self-mixing interference correlation speed measuring device which comprises a power supply and signal processing analysis circuit and two focusing laser beam devices, and each focusing laser beam device is connected with the power supply and signal processing analysis circuit. According to the device, the defect that laser Doppler speed measurement cannot be carried out automatically is overcome, and the sensitivity and the precision of laser self-mixing interference speed measurement are improved. The invention also discloses a laser self-mixing interference correlation velocity measurement method. 本发明公开激光自混合干涉相关测速装置，包括有供电及信号处理分析电路及两个聚焦激光光束装置，每个聚焦激光光束装置均与供电及信号处理分析电路连接。该装置解决了激光多普勒测速不能进行自主测速的缺陷，提高了激光自混合干涉测速的灵敏度和精度。本发明还公开了激光自混合干涉相关测速方法。