Adopting signal filtration and noise weeding, high precision and fast measurement of phase difference is realized, based on the A/D hardware and a LabVIEW virtual instrument platform.

• 基于数据采集硬件设备和虚拟仪器软件平台，通过对信号的滤波和去噪处理，实现了相位差的高精度快速测量。