提出了利用基于LabView可视化语言的虚拟数字锁相技术对相位调制激光多普勒频移测量方法的鉴频参量进行测量的方法，并对其进行了理论与实验研究。为了防止待测信号与参考信号通道间的干扰以及在参考信号传输过程中混入噪声，该虚拟数字锁相技术采用参考信号内部生成的方法。为了保证参考信号与待测信号之间的同频性以获得精确的鉴频参量测量结果，在该虚拟数字锁相技术中引入了虚拟数字锁相环来实时精确捕获待测信号频率。通过利用其对实际信号光相位调制信号的测量，证明了该虚拟数字锁相鉴频参量提取方法的正确性和可行性。

The virtual digital phase locking technique based on LabView visual language is proposed to measure the frequency parameter of phase modulation laser Doppler shift measuring method, and investigate it theoretically and experimentally. For preventing the disturbance between the test signal and the reference signal channels and mixed with noise in the process of reference signal transmission, this virtual digital phase locking technique adopts the method of reference signal generated inside. In order to ensure the same frequency between reference signal and test signal for accurate frequency parameter measurements, the virtual digital phase locking loop for accurately capturing the test signal frequency is introduced into the virtual digital phase locking technique. The validity and feasibility of the virtual digital phase locking frequency parameter measuring method are proved through measuring the practical phase modulation beat signal.