研究了一种激光多普勒测振新方法,它甚至在相当大的高斯噪声干扰下也能照常使用。这种方法通过双频谱分析可以将振动的幅度和位相从检测信号和参考信号中间分离出来,因此要用到检测信号的重要的双频谱特性,这个特性反映出频率受振动调制的情况。双频谱分析的应用排除了高斯噪声的干扰,实现了在噪声环境中仍能正常工作的测量系统。实验结果清楚地表明这种方法是有效的。 A new method of laser Doppler vibration measurement is studied, which can be used even under considerable Gaussian noise disturbances. This method allows the amplitude and phase of the vibration to be separated from the detection signal and the reference signal by means of dual-frequency spectrum analysis. Therefore, the important dual-spectral characteristic of the detection signal is used, which reflects the frequency-modulated oscillation. The application of dual-spectrum analysis eliminates the interference of Gaussian noise and enables the measurement system to operate normally in a noisy environment. The experimental results clearly show that this method is effective.